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Unique

Unique RV Digest-It Ultra Liquid RV Tank Treatment, 32 oz

  • Based on 13,042 reviews
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Availability: Only 3 left in stock, order soon!
Fulfilled by Amazon
Arrives Tuesday, Oct 20
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Scent: Ultra


Size: 32 Fl Oz (Pack of 1)


Features

  • Helps prevent tank problems before they start; this RV black tank treatment controls odors and breaks down waste to help reduce buildup that can lead to clogs and sensor issues in your RV toilet or holding tank
  • Powerful bio-enzymatic RV tank treatment; controls odors and liquifies waste fast to help reduce buildup and support overall RV septic tank treatment performance
  • RV toilet treatment; one 32 oz bottle delivers 16 two-ounce treatments for regular preventive maintenance of RV black tanks
  • Simple liquid RV toilet treatment; measure 2 oz per treatment and add after dumping with plenty of water to maintain your RV black tank 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

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+ is our strongest holding tank treatment and it is specifically designed to be used in RV black tanks and gray tanks. This professional-grade toilet treatment is powered by our strongest bio-enzymatic treatment blend. If you want the absolute strongest, you found it! 10x stronger than our original Unique RV Digest-It Holding Tank Treatment formula, RV Digest-It+ RV black tank enzyme treatment will ensure your tanks remain free from odor, waste buildup, and clogs. Unique is the 1 waste tank treatment brand recommended by RV techs. The strongest all-around camper septic tank treatment available, RV Digest-It+ dissolves human waste and all brands of toilet tissue, and doesn't mask odors, it removes them. Can be used in gray tanks too, contains no formaldehyde or bronopol, won't damage or degrade seals or valves, complies with all state dumping laws, contains no hidden chemicals, proudly made in the USA.

Product Dimensions ‏ : ‎ 3.15 x 3.15 x 9 inches; 2.27 pounds


Item model number ‏ : ‎ 415-AZ


Date First Available ‏ : ‎ February 1, 2023


Manufacturer ‏ : ‎ Unique Manufacturing & Marketing


Best Sellers Rank: #137 in Automotive (See Top 100 in Automotive) #1 in RV Tank Sanitation Chemicals & Cleaners


#1 in RV Tank Sanitation Chemicals & Cleaners:


Customer Reviews: 4.6 4.6 out of 5 stars (13,042)


Item Form: Liquid


Scent: Ultra


Specific Uses For Product: Routine RV Holding Tank Treatment


Surface Recommendation: Plastic holding tanks; rubber seals; valves; tank sensors; PVC plumbing lines


Special Features: Compatible with septic systems, Designed for black tanks, Enzyme-based waste and toilet paper digestion, Sensor-safe buildup reduction, Supports routine tank maintenance


Special Ingredients: Bacteria cultures, Enzyme blend, Surfactants


Cleaning Agent Formulation: Detergent


Container Type: Bottle


Recommended Uses For Product: Use regularly in RV black holding tanks to support waste breakdown, odor control, and sensor function during routine tank maintenance


Product Benefits: Aids smoother tank dumping, Helps break down organic waste and toilet paper, Reduces buildup that can affect sensors, Supports odor control in holding tanks, Works best in black water systems


Item Volume: 32 fluid ounces


Unit Count: 32 Fluid Ounces


Number of Items: 1


Item Weight: 2.3 pounds


Size: 32 Fl Oz (Pack of 1)


Brand Name: Unique


Global Trade Identification Number: 73


Manufacturer: Unique Manufacturing & Marketing


UPC: 736683009473


Item Highlight: Controls odors without masking & digests waste/toilet paper fast; 16 RV toilet treatments for routine holding tank care


Included Components: 32 oz. Extra-Strength RV Black Tank Treatment


Item Type Name: Extra-Strength RV Black Tank Treatment


Model Number: 415-AZ


Part Number: 415-AZ


Warranty Description: Satisfaction Guaranteed


Material Features: Non-caustic formula


Material Type Free: Bronopol Free, Formaldehyde Free


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Tuesday, Oct 20

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Leasing options through Acima may also be available during checkout.

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Similar Products

Top Amazon Reviews

    • This stuff works!
Scent: Ultra Easy-Measure Size: 32 Fl Oz (Pack of 1)
The stuff works great for a treatment for my black tank! I’ve never had any problems with buildup in it and it does remove the smell within an hour or two I would say. Some people say it has a very chemically smell and I don’t necessarily disagree with that, but you’ll only smell it within an hour after using it. This kind of makes your waist smell more like rotten pea soup than actual crap I would say when you’re draining the black tank but other than that, you wouldn’t smell it throughout the week or two. ... show more
Reviewed in the United States on September 11, 2026 by Michael Lavallie
    • Eco Friendly and Effective Septic Treatment Solution
Scent: Ultra Easy-Measure Size: 32 Fl Oz (Pack of 1)
★★★★★ 5 out of 5 stars If you're fighting flies, drain moths, or mosquitoes that seem to be coming up through your sewer lines in an RV, mobile home, fifth wheel, or portable toilet, this product is absolutely worth trying. I bought Digest-It Ultra after it was recommended by my friend Ralph, ChatGPT AI. I had reached the point where I was completely over battling the invasion of insects. I followed the directions exactly as written and even gave my sewer system a thorough flush beforehand to give the treatment the best chance of success. The live enzymes in the Ultra formula really do the heavy lifting. It helps break down waste, reduces odors, minimizes buildup in the plumbing, and most importantly, it helped eliminate the breeding ground for the insects. I noticed a significant improvement after about 3 days, and by 7 days the flies and other unwanted visitors were completely gone. After 30 days, the plumbing line from my toilet to the sewer hookup looked noticeably cleaner than it had in a long time. My advice is simple: buy the Ultra version, not the standard Digest-It. Use it exactly as directed and stick with the monthly maintenance schedule. For me, it's money well spent, and I'll definitely continue purchasing it. ... show more
Reviewed in the United States on July 1, 2026 by XLARRYBEARX
    • This product works better than the ones I used to use.
Scent: Ultra Size: 32 Fl Oz (Pack of 1)
You got to purchase this product it did just exactly is what I heard that it would do it cleared out my drain and left my camper without odor. It was odorless the bottle did not leak. The bottle size contained the amount that I ordered. It consistently worked every time I used it. The bottle has nice durability, I keep it under the counter and I don't want it to Leach out. This bottle certainly does not. ... show more
Reviewed in the United States on August 31, 2026 by Frances
    • No more odors! Won't cure tank your indicator issues...
Scent: Ultra Size: 32 Fl Oz (Pack of 1)
Never used this so I thought I'd give it try. It definitely kills the odors, and based on tank draining definitely breaks down the solids and paper. It did nothing to cure the tank indicators that are always on however. This stuff does what it says!
Reviewed in the United States on August 12, 2026 by CMT
    • The best black tank treatment I've found—powerful enzymes, amazing results, and worth every penny.
Scent: Ultra Easy-Measure Size: 32 Fl Oz (Pack of 1)
⭐⭐⭐⭐⭐ Living in an RV comes with its share of challenges, but in my opinion, nothing is worse than having problems with your black tank. I've tried several holding tank treatments over the years that claimed they would control odors and break down waste, but most of them never lived up to the promises on the bottle. This product was completely different. I had a clog developing in my black tank, so I added the recommended amount and hoped for the best. About six hours later, the clog was completely gone. I honestly couldn't believe how well it worked. One of the reasons I chose this product is because it uses live enzymes instead of relying on heavy perfumes or harsh chemicals. The enzymes actually break down the waste and toilet paper, which is exactly what you want in a healthy black tank. In my experience, that's the difference between products that simply mask problems and one that actually solves them. After using this, I can definitely understand why enzyme-based treatments have such a good reputation. The value is outstanding, especially considering how well it performs. I would gladly pay two or three times the price to avoid dealing with another black tank clog. This has earned a permanent place in my RV supplies, and I won't be switching to another brand. **The best black tank treatment I've found—powerful enzymes, amazing results, and worth every penny.** ... show more
Reviewed in the United States on July 22, 2026 by J Elrod
    • Great for regular black tank maintenance!
Scent: Ultra Size: 32 Fl Oz (Pack of 1)
This stuff works to maintain black tanks between flushes. Keeps tanks odor free and does a great job liquifying solids. Easy to use, ready to go out of the bottle!
Reviewed in the United States on September 8, 2026 by Quagmire
    • Great product
Scent: Ultra Easy-Measure Size: 32 Fl Oz (Pack of 1)
This is a very good product it works as described. I have been using it in my motorhome for 4 months and it works no smell and no clogs.
Reviewed in the United States on September 9, 2026 by bernie olszewski
    • It worked, but I had to use the whole bottle and it was a little pricey
Scent: Ultra Easy-Measure Size: 32 Fl Oz (Pack of 1)
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 ... show more
Reviewed in the United States on March 29, 2026 by ebony Clark

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