Search  for anything...

Happy Campers RV Toilet Treatment 18 - Extra Strength Odor Eliminator for Black and Gray Holding Tanks

  • Based on 13,930 reviews
Condition: New
Checking for product changes

Buy Now, Pay Later


As low as $7 / mo
  • – 4-month term
  • – No impact on credit
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout. Payment plans are offered through our trusted finance partners Klarna, PayTomorrow, Affirm, Afterpay, Apple Pay, and PayPal. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Free shipping on this product
This item's return window has been extended for the holiday season: Returnable until Jan 31, 2025

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.


Availability: In Stock.
Fulfilled by Amazon

Arrives Monday, Dec 30
Order within 17 hours and 19 minutes
Available payment plans shown during checkout

Features

  • Powerful Odor Control: Say goodbye to unpleasant odors with our powerful formula that neutralizes and eliminates foul smells, leaving your RV smelling fresh and clean.
  • Effective Waste Digestion: Happy Campers breaks down waste and toilet paper quickly and efficiently, preventing clogs and ensuring smooth tank operation.
  • Long-Lasting Performance: Our concentrated formula means a little goes a long way. A single treatment provides lasting results, saving you money and hassle.
  • Safe for All Tanks: Compatible with all septic systems and holding tank materials, our treatment is versatile and reliable, ensuring optimal performance in any RV or marine environment.
  • Easy to Use: Simply add the measured amount of Happy Campers to your holding tank, and let our formula do the rest. No mess, no fuss just straightforward application for a worry-free adventure.
  • Versatile Application: Ideal for use in RVs, boats, and portable toilets. Wherever your journey takes you, Happy Campers will keep your sanitation system operating at its best.

Brand: Happy Campers


Item Form: Granule


Scent: Unscented


Specific Uses For Product: RV Holding Tank


Material Feature: Fragrance Free


Manufacturer: ‎RV Concepts


Brand: ‎Happy Campers


Item Weight: ‎1.13 pounds


Product Dimensions: ‎3.5 x 4.25 x 4.5 inches


Item model number: ‎HC-18-oz


Is Discontinued By Manufacturer: ‎No


Manufacturer Part Number: ‎HC-18


Special Features: ‎Concentrated


Date First Available: October 19, 2011


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Monday, Dec 30

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.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Top Amazon Reviews


  • THIS is the tank treatment solution you want!
Amazing product! I live full time in a fifth wheel camper and was previously using Bio-Pak tabs for black tank treatment; they worked decently, but this powder? Whole other level. I dump the black tank once weekly on Sunday, prefill the freshly emptied tank with about 4 gallons of water and one Happy Campers treatment before resuming regular use, and have no odor come back up through the toilet until Friday or Saturday. The odor that does come up is still much less offensive than when I was using Bio-Pak. Even dumping the tank is less smelly and faster, as it breaks down everything very efficiently. Happy Campers may seem more expensive than brands upfront, but per treatment it's only about 10 to 15 cents more (on average) than less effective competitors - WELL worth it! If you want true odor elimination, a faster dump time, and a cleaner black tank, Happy Campers is the product you want. ... show more
Reviewed in the United States on November 4, 2024 by s.patterson

  • What sorcery is this stuff?!?
I don’t know what they put in this stuff, but it is the best toilet chemical deodorizer I have ever used. We have had an RV for over 20 years now, and have tried everything. I kept hearing about this, but held off because of the cost. We had a situation come up where we couldn’t dump our black tank for 2 weeks. This happened a year ago as well, and we used the chemicals from the big box store back then. We added twice the amount called for to keep odors down, and the odors were soooooo bad after two weeks! It took us at least a month to finally get the odors out. So, when this same situation came up, we were desperate, and decided to buy this. We used overnight shipping so we could get the chemicals in there fast. After two weeks, I entered my camper’s bathroom, expecting to smell at least a little odor. Nope! I shook my head in disbelief as I opened the toilet seat, expecting to faint because of the odor. Not one odor vapor was to be found! Zero stench! Zero! In conclusion, this stuff is pricey, but ohhhhhh so worth it if you find you can’t dump your tank for a few weeks. I am totally sold! ... show more
Reviewed in the United States on August 4, 2024 by P. Morris

  • This is the one!
After buying and trying so many different treatments hoping they would work I found this. FINALLY a product that really works!!! Very easy to use just measure mix with water and flush it down. NO MORE SMELL period....I have used this on several trips now even during the hottest part of the summer on a week long camp and it did its job. Thank You. ... show more
Reviewed in the United States on October 9, 2024 by Brainrott

  • Wow. Worth every dime.
We saw this on a tik tok video and saw it discussed on a rv Facebook page. We have owned and used rvs for 35 years and tried EVERY home remedy and store bought product known to man to try to keep our tanks clean and non smelling. We bought this thinking 30 bucks wasted again but we were pleasantly surprised. Follow directions and add little bit of extra water. So pleased with this purchase. Cleaning was a snap. Everything came out as a liquid. No clumps or lumps. Hardly zero smell. Rinsing tanks was a breeze. Yep. We will buy it again and have told all our friends to buy it also.. ... show more
Reviewed in the United States on September 26, 2024 by Kezbeth

  • Does not work for Porta Potti
Initially i bought happy campers treatment to be used for my thetford porta potti 365. i only use the porta potti for no. 1 and only needed to be emptied around once a week. previously i use walex porta pak so i tried switching to happy campers treatment because everybody was singing praises about this product but unfortunately for me, happy campers treatment is unable to cover the odor because i could always smell urine whenever i use the porta potti and by the end of the week where i empty the waste tank, it reeks horribly :( i am not sure if my dosage is not enough or is it because the previous usage of walex porta pak has some residues remain that lower the effectiveness of happy campers but the waste tank smell horrible at the end of the week when i empty it. i tried cleaning the tank and give another shot but the smell is still bad and emptying it at the end of the week is horrible. after reading that happy campers treatment requires oxygen and does not do well in airtight environment like a porta potti, i guess i will stick back to walex porta pak for my waste tank. so i started using happy campers treatment for my grey tank instead and to my surprise, it works amazingly well! usually my grey tank will smell bad at the end of the week but ever since using happy campers treatment, the grey tank has no smell at all. it's a miracle and emptying my grey tank is a breeze now. ... show more
Reviewed in the United States on February 11, 2024 by Quanfu

  • No smell
Works amazingly!! We do empty out black tank every week. I then add water and 1 scoop. Never have a bad smell
Reviewed in the United States on December 18, 2024 by tammy

  • AMAZING & MAGICAL
Don't go camping without it! You will never have a smell again. I love this stuff and have used it for 3 years.
Reviewed in the United States on November 15, 2024 by AmazonCustomer

  • Let's just say that I'm a Happy Camper.
After 2 years in our 2022 Coleman, I feel we maintain our black tank fairly well. Our rear bath didn't smell bad at all, i just wanted to try something different. When we got back home from our last trip, I put a scoop of HC into the black tank per the instructions. The next day when I went back into the trailer, the bathroom itself smelled fantastic....again.....it didn't smell bad before HC, it just smells even better and fresher now. ... show more
Reviewed in the United States on October 13, 2024 by Enkidu

Can't find a product?

Find it on Amazon first, then paste the link below.