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  • 10 VIDEOS
  • Unique RV Digest-It Ultra RV Toilet Treatment, 32 Uses, Super Concentrated - Eliminates Odor and Liquifies Waste, Easy-Measure Extra-Strength Preventive Bio-Enzymatic Holding Tank Treatment (32 oz)
  • Stop Tank Odors Before They Start--See How Ultra WorksUnique Manufacturing & Marketing

Unique RV Digest-It Ultra RV Toilet Treatment, 32 Uses, Super Concentrated - Eliminates Odor and Liquifies Waste, Easy-Measure Extra-Strength Preventive Bio-Enzymatic Holding Tank Treatment (32 oz)

4.6 out of 5 stars (12,475)

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Scent: Ultra
Size: 32 Fl Oz (Pack of 1)
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Item Form Liquid
Scent Ultra
Specific Uses For Product Routine RV Holding Tank Treatment
Surface Recommendation plastic, rubber, metal, polyethylene, valve components
Special Features Bio-enzymatic digestion formula, Compatible with black and gray tank systems, Designed for high-temperature RV conditions, Safe for seals and valve components, Ultra-concentrated liquid with measured dosing
Special Ingredients Bacteria cultures, Enzymes, Surfactants
Contains Liquid Contents? Yes
Cleaning Agent Formulation Detergent
Container Type Bottle
Recommended Uses For Product Use regularly in RV black and gray holding tanks to support waste digestion, odor control, and ongoing tank maintenance
Product Benefits Compatible with black and gray tank systems, Helps break down waste and toilet paper, Helps reduce buildup that can lead to clogs, Maintains tank performance with routine use, Supports odor control in holding tanks, Supports smoother tank emptying
Item Volume 32 Fluid Ounces
Unit Count 32.0 Fluid Ounces
Number of Items 1
Item Weight 2.4 Pounds
Size 32 Fl Oz (Pack of 1)

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Unique RV Digest-It Ultra RV Toilet Treatment, 32 Uses, Super Concentrated - Eliminates Odor and Liquifies Waste, Easy-Measure Extra-Strength Preventive Bio-Enzymatic Holding Tank Treatment (32 oz)


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This item: Unique RV Digest-It Ultra RV Toilet Treatment, 32 Uses, Super Concentrated - Eliminates Odor and Liquifies Waste, Easy-Measure Extra-Strength Preventive Bio-Enzymatic Holding Tank Treatment (32 oz)
$21.99 ($0.69/fluid ounce)
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$12.57 ($0.52/fluid ounce)
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Important information

Ingredients

Proprietary Bio-Enzymatic Blend (Bacteria Cultures, Enzymes, Surfactants)

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Product description

RV on the beach background, bottle o RV Digest-It Ultra, icons of features and benefits
RV motorhome in the desert, polaroids of happy campers making memories
Bottle of RV Digest-It Ultra, backed by The Unique Cares Promise
Unique products are trusted by thousands of RVers every day

Which Product is Right for Me?

Unique RV Digest-It Ultra

Unique Clean-It

Unique Clear-It

Unique Restore-It

Unique Scrub-It

Unique Store-It

Customer Reviews
4.6 out of 5 stars 12,475
4.6 out of 5 stars 1,337
4.4 out of 5 stars 1,243
4.2 out of 5 stars 1,006
4.7 out of 5 stars 1,689
4.5 out of 5 stars 198
Price
$21.99 $20.99 $22.47 $23.99 $12.57 $19.99
Product Type:
Holding Tank Toilet Treatment Black Tank Deep Cleaner Black Tank Unclogger Black Tank Sensor Cleaner RV Toilet Bowl Cleaner Black Tank Storage Treatment
Product Use:
Regular black tank maintenance Deep cleans black tanks Clears clogs & backups fast Restores misreading sensors Removes toilet stains + odors Cleans tank during storage
Additional Features:
Our strongest, fastest formula Like power washing your tank Clears most clogs in 72 hours Trust your sensors again Also enhances black tank Safe for long-term storage
Frequency of Use:
Use every time you dump Use every 4-6 months Use as needed Use as needed Use often Use as needed
Powerful probiotics + enzymes
Backed by Unique Cares Promise
Made in the USA

From the brand

Product details

  • Product Dimensions ‏ : ‎ 5.3 x 2.5 x 9.2 inches; 2.4 Pounds
  • Item model number ‏ : ‎ 417-AZ
  • Date First Available ‏ : ‎ May 28, 2024
  • Manufacturer ‏ : ‎ Unique Manufacturing & Marketing
  • ASIN ‏ : ‎ B0D5DPT2BB
  • Best Sellers Rank: #102 in Automotive (See Top 100 in Automotive)
  • Customer Reviews:
    4.6 out of 5 stars (12,475)

Customer reviews

4.6 out of 5 stars
12,475 global ratings

Customers say

Customers find this RV toilet treatment effective, completely liquifying waste and breaking it down into sludge. They appreciate its ease of use, being convenient to pour into the tank, and its ability to clean and remove solid waste and paper. Moreover, the product receives positive feedback for its quality, odor control, and versatility for RVs. However, opinions on value for money are mixed, with some finding it worth the price while others consider it overpriced.
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742 customers mention effectiveness, 620 positive, 122 negative
Customers find that the cleaning agent works extremely well, completely liquifying waste and working effectively in both toilet bowls and black tanks.
...on the market , stop buying junk and buy this with confidence, works great , use as directed and you will be amazed, will continue to buy all the...Read more
Works well .. have a seasonal lot with a lot of traffic in our camper so this is a must to keep smells down and works as described some of the best...Read more
Works as advertised! I live in an RV & smells from your tanks can get......... interesting or raunchy would be a better word!...Read more
I use this for my RV gray water tank and it works very well. I use it after I wash the dishes and pour it down the sink after and rinse it well....Read more
492 customers mention odor control, 349 positive, 143 negative
Customers report that the cleaning agent effectively eliminates odors.
Helps break down toilet paper & human waste so there is no odor. The enzymatic properties also help prolong life of sensors .Read more
I gave the scent 5 stars because there is no scent. Put some down the toilet and forget about it....Read more
...at, was stated that this stuff stinks and when i smell it there is no smell as if it had been watered down. Possibly to the point it is ineffective.Read more
Safe to transport, comes in sealed bottles. Smells great, keeps the toilet clean and odor free.Read more
348 customers mention quality, 326 positive, 22 negative
Customers find the cleaning agent to be of high quality, with one customer noting it performs better than Happy Camper.
This is a great product and definitely recommend but I am in a time crunch and received this bottle with a crack in it to where the solution leaked...Read more
It was good product but really not sure if it did any difference then Ridx - I do thing it helped keep the smell down in between dumps.Read more
This is the best RV black and gray water tank maintenance to keep outdoors at bay. It only takes 2-4 ounces at a time. Love it!Read more
Excellent product. We are new to RV world and this was a major concern. This product was recommended by the company we bought our RV from....Read more
175 customers mention waste removal, 143 positive, 32 negative
Customers report that the cleaning agent effectively dissolves waste, including tissue and toilet paper, and breaks it down into sludge.
Breaks down the waste,but it doesn't control odor. I would use something else with odor control. I'm not buying it again....Read more
The best black tank treatment I have used. Keeps scent down and dissolves everything. Easy to use.Read more
...I’ve been using it for about a year now, and it truly breaks down all the solids in the holding tank into a liquid or sludge, which makes dumping so...Read more
Breaks everything down and helps with smellsRead more
134 customers mention ease of use, 129 positive, 5 negative
Customers find the cleaning agent easy to use, particularly noting that it's simple to measure and pour into the tank.
...smell down, helps to keep rv tank clean and operating smoothly, easy to use, good price, i have used quite a few differnt products untill i started...Read more
Very easy to use. Dont have any oders on our bath room at all. It also breaks down all toilet paper and solid waste.Read more
...I could flush but when I did flush it came out of the tanks smooth and easy not clumpy not a lot of paper most of it had dissolved....Read more
...Better liquification than others and super easy to use. It’s all we carry now and have had very good success with tank emptying and no clogs.Read more
114 customers mention cleaning performance, 111 positive, 3 negative
Customers praise the cleaning agent's performance, noting it effectively cleans black tanks, removes solid waste and paper, and breaks down sludge.
The best black tank treatment I have used. Keeps scent down and dissolves everything. Easy to use.Read more
...I have owned campers for over 25 years, this is by far the best tank treatment.Read more
Works great. Best black tank cleaner I’ve ever used.Read more
Great Black Tank CleanerRead more
53 customers mention versatility, 50 positive, 3 negative
Customers find the cleaning agent versatile and effective for RVs, with one customer specifically mentioning it works well for black tanks and grey tank dumps.
This is the BEST rv holding tank treatment on the market! I will NEVER use anything else!Read more
...This is a MUST HAVE product for your camper!!!!Read more
...Well worked great. I then bought the big one. You can also use this in your gray tank. Which the TST pods are only good for blk tank. Smell. Nope....Read more
...stop buying junk and buy this with confidence, works great , use as directed and you will be amazed, will continue to buy all the products this...Read more
118 customers mention value for money, 59 positive, 59 negative
Customers have mixed opinions about the cleaning agent's value for money, with some finding it worth the price while others consider it not worth the extra cost.
...helps to keep rv tank clean and operating smoothly, easy to use, good price, i have used quite a few differnt products untill i started using this...Read more
Does NOT help with odor. Waste of money. Update: after writing this review, I must say that the company stands behind their reputation....Read more
...The whole line of products are amazing. Completely worth the money!Read more
This product is way too expensive. It does ok cleaning the tank, but I found many other products that clean the tank better for cheaper....Read more
PROOF IS IN THE PUDDING-LIKE DIGESTED DOG KIBBLE
5 out of 5 stars
PROOF IS IN THE PUDDING-LIKE DIGESTED DOG KIBBLE
A few years ago, I conducted a similar experiment, comparing black and gray water tank treatments using dog poop. In that experiment, TankTechsRx came out the winner over the other product (I’m sorry, I no longer remember that product’s name), as it did a much better job of reducing the odor. I recently encountered this product, which had good reviews, so I bought a bottle of it—Unique RV Digest-It—to compare with my TankTechsRx. Unique showed how their product would digest dog kibble, and that it has a similar composition to human waste: protein, fat, carbohydrate. So I tried it myself. The experiment was this: I mixed a capful of each product with water to nearly fill a small glass, and then I placed five pieces of small dog food kibble in each glass and let them sit. The photo showing the glass with the brown colored liquid is the one with TankTechsRx product, which is naturally brown. Result: Within 12 hours or so, the Unique RV Digest-It had reduced the kibble to a sludge at the bottom of the glass, whereas the glass with the TankTechsRx still held solid chunks of kibble. The odor was also different, with the TankTechsRx glass smelling a bit funky, while the Unique RV Digest-It glass had a faint, but rather pleasant, almost floral, smell to it. I will be using Unique RV Digest-It from now on in my gray water tank. We have a composting toilet, so we don’t use a black water tank. However, we have been spraying a mixture of water and TankTechsRx in our composting toilet, which has seemed to help with the composting process and odor control. I will now be trying the Unique RV Digest-It in the same way, expecting good results. I would surmise from my experiment that Unique RV Digest-It would work well in a black water tank and accomplishing what it advertises: 1. BREAKS DOWN SOLID WASTE INSIDE TANKS. Liquifies human waste and all brands of toilet paper. Digests residual sludge from years of build-up. Works in black and gray tanks. 2. ELIMINATES TOILET & TANK ODORS without masking. Extra strength activated cleaners eliminate odors at their source without covering them with overpowering perfumes. 3. HELPS PREVENT SENSOR MALFUNCTION. Cleans and removes solid waste and paper before it can cling to sensor probes, preventing misreads. Yes, I have no association with either company. Yes, I suggest others give Digest-It a try.
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Top reviews from the United States

  • 5 out of 5 stars
    Did My Research After Trying Many Others – This Is the One!
    Reviewed in the United States on April 12, 2026
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    Did My Research After Trying Many Others – This Is the One!

    After trying several RV toilet treatments over the years with mixed results, I finally did some serious research before my next purchase—and Unique RV Digest-It+ is the one I landed on, and so far I'm convinced it's the best I've used.

    The extra-strength formula does an impressive job of liquifying waste and breaking down all brands of toilet paper without leaving anything behind in the tank, which is exactly what you need for a clean, problem-free black tank. The odor elimination is noticeably effective—no chemical smell, no unpleasant odors coming back up through the toilet, just genuinely fresh results. For RV use where black tank maintenance is a critical part of every trip, having a treatment you can actually trust makes a real difference in the overall experience.

    It's also reassuring that it's safe for all RV and marine holding tanks and septic systems, so there's no concern about damaging seals or sensors. After testing many products, this one stands out for its effectiveness, reliability, and clean results. If you've been bouncing between RV toilet treatments looking for the right one, do yourself a favor and make this your last stop.

    11 people found this helpful
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  • 5 out of 5 stars
    Great product
    Reviewed in the United States on May 28, 2026
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    This works very well and we have not had any odors

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  • 5 out of 5 stars
    Illuminated the odor
    Reviewed in the United States on April 21, 2026
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    This product worked very well using the instructed amount. It appeared to break down the waste well and eliminated the toilet odor

    2 people found this helpful
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  • 4 out of 5 stars
    Great Black Tank Cleaner…
    Reviewed in the United States on April 16, 2026
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    If you’re looking for a chemical that does a really good job then look no further than. I noticed since I started using this companies chemical my black tank No Longer smells! It really does a good job on getting my Black tank cleaner. Instead of cleaning my black tank 3 to 4 times…. I’m now doing it just Twice. Thumbs up for this product!

    One person found this helpful
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  • 5 out of 5 stars
    Amazing Tank Treatment — Works Exactly as Promised
    Reviewed in the United States on April 18, 2026
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    This stuff is amazing. I’ve been using it for about a year now, and it truly breaks down all the solids in the holding tank into a liquid or sludge, which makes dumping so much easier. It does exactly what you want a tank treatment to do — everything dissolves properly, and there’s no buildup left behind.

    One of the biggest benefits I’ve noticed is that my tank sensors have become much more accurate since using it. Anyone who owns an RV knows how frustrating those sensors can be, so that improvement alone makes this product worth it.

    Overall, it’s effective, reliable, and makes tank maintenance far less of a headache. Highly recommended for any RV owner.

    6 people found this helpful
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  • 5 out of 5 stars
    Best product
    Reviewed in the United States on May 24, 2026
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    Made in the U.S.A, that alone sold me. The other it works great. Dose it smell pretty absolutely not. But I just need it to work and it dose. Great product.

    One person found this helpful
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  • 5 out of 5 stars
    Works Well
    Reviewed in the United States on May 29, 2026
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    Liquifies human waste & paper

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  • 3 out of 5 stars
    It worked, but I had to use the whole bottle and it was a little pricey
    Reviewed in the United States on March 29, 2026
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    I like it I would buy it again. I do say it was the best toilet treatment that I ever used for my RVs. I did have a pyramid plug, but I did have to use the whole bottle. It worked with breaking up tissue and breaking up the pyramid Plug, but I still had some lingering smells. I’m going to at least keep it in my toilet for 3+ weeks because my septic system is not full yet and I only get it dumped out about twice a year because I have a large septic system so it will have a lot of time in my system to work but at the same time it took the whole bottle to be able to get rid of the smell and actually work I know it stated that it was 32 treatments. It was a little less than $30 and it was only one treatment for me. I did use about 20 gallons of water after just to push everything through the system. I live off grid where I don’t have a lot of water to spare when flushing I do the best I can so I probably wouldn’t have this problem if I had endless water to where I can use as much as I needed it to flush and also keep some water in my toilet bowl afterwards, but it did help me with my problem, but I did have to use the whole bottle so it was worth the $30 to help me with my problem, but most definitelyexpect to use the whole bottle at least half of the bottle when purchasing

    4 people found this helpful
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Top reviews from other countries

  • 5 out of 5 stars
    Great product
    Reviewed in Canada on May 28, 2026
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    Best RV toilet chemical I have used.

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  • 5 out of 5 stars
    Finally found what we needed!
    Reviewed in Canada on June 12, 2025
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    Being new the RV life we wanted to find a black tank product that was easy, powerful and practical.

    We are very happy with this product as it checks all the boxes! No more pyramids, no more toxic smells, and easy tank drainage! This will be our only black tank product going forward!

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  • 5 out of 5 stars
    Does the trick and has lasted the full camping season.
    Reviewed in Canada on November 2, 2025
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    When the black tank is drained, waste flows easily because it is broken down ... no more clogs and no more stinkies.

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  • 4 out of 5 stars
    Works great
    Reviewed in Canada on August 11, 2025
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    Works great and was the best from the research I did, but ended up finding something different that worked better. But this is still a great product I recommend it

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  • 5 out of 5 stars
    RV digest-it black tank treatment
    Reviewed in Canada on November 23, 2025
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    Rv black tank treatment works great and smells amazing.

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Product Summary: Unique RV Digest-It Ultra RV Toilet Treatment, 32 Uses, Super Concentrated - Eliminates Odor and Liquifies Waste, Easy-Measure Extra-Strength Preventive Bio-Enzymatic Holding Tank Treatment (32 oz)

From Unique

4.6 out of 5 stars, 12,475 ratings

Customer reviews

1K+ bought in past week

Price

One-time purchase: $21.99 ( $0.69 / fluid ounce) 8% Savings

List Price: $23.99

Subscribe & Save price (No fees, Cancel anytime): $20.89 ( $0.65 / fluid ounce) 13% Savings

List Price: $23.99

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About this Item

  • Prevents tank problems before they start; this RV black tank treatment breaks down waste and eliminates odors so buildup, clogs, and sensor issues don’t develop in your RV toilet or holding tank
  • Powerful bio-enzymatic RV tank treatment; liquifies waste fast and works as a toilet deodorizer to help control odors, reduce sludge, and improve overall RV septic tank treatment performance
  • Super concentrated RV toilet treatment; one bottle delivers 32 treatments, making it a reliable choice for RV essentials and camper essentials without constant repurchasing
  • Easy-to-measure liquid RV toilet treatment; simple dosing makes it easier to maintain your RV toilet compared to toilet drop ins, helping keep tanks clean, trip after trip
  • Unique Cares program included with every purchase; helping you experience worry-free RVing with access to our Colorado-based Certified RV Tech Team for expert assistance with wastewater issues

Product Description

Enjoy your RV. Leave your holding tanks to us. Stop wasting time worrying about your holding tanks and spend more time enjoying your RV! Unique RV Digest-It Ultra RV toilet treatment, with an easy-measure bottle and 32 treatments, is specifically designed to be used in RV black tanks and RV gray tanks as a regular, preventive maintenance treatment. For best results, use RV Digest-It Ultra regularly as part of your normal RV tank maintenance routine. Our strongest bio-enzymatic treatment blend powers this professional-grade RV holding tank treatment. RV Digest-It camper toilet treatment helps maintain tanks by breaking down waste and toilet paper, helping prevent sewer smells, waste buildup, and other issues before they start. RV Digest-It Ultra-Concentrate liquifies human waste and all brands of RV toilet tissue and doesn't just deodorize or mask bad smells, it neutralizes them—even in hot weather. Used consistently as part of routine tank care, it helps keep your RV black and gray tanks operating the way they should. It can also be used as an RV grey water tank treatment, so add it to your needed RV accessories list. Unlike some RV toilet chemicals, it won't damage or degrade seals or valves, complies with all state dumping laws, contains no hidden chemicals, and is proudly made in Arvada, Colorado, USA. You get more than a great RV holding tank treatment with RV Digest-It Ultra. Our team of RV experts is ready to help you with any of your wastewater questions; instructions for reaching them are on the back of the bottle. RV Digest-It Ultra is designed as a preventive tank maintenance treatment. While some users report improvements with buildup, odors, or sensor readings when used regularly, it is not designed to fix misreading sensors or clear clogs. For restoring malfunctioning sensors, we recommend using Unique Restore-It, and to clear a clogged black tank, we recommend Unique Clear-It. Need to treat your boat's black tank? Try Unique Marine Digest-It. Disclaimer: Ingredient disclosures are to the best of our knowledge based upon information provided by our raw material suppliers.

Options Available

Scent

  • Classic
  • Plus
  • Ultra

Size

  • 32 Fl Oz (Pack of 1)
  • 32 Fl Oz (Pack of 2)
  • 32 Fl Oz (Pack of 3)
  • 128 Fl Oz (Pack of 1)
  • 128 Fl Oz (Pack of 2)
Browse all available options

Important Information

Ingredients

Proprietary Bio-Enzymatic Blend (Bacteria Cultures, Enzymes, Surfactants)

Legal Disclaimer

Statements regarding dietary supplements have not been evaluated by the FDA and are not intended to diagnose, treat, cure, or prevent any disease or health condition.

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