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Your cart is empty.When added to holding tanks, Odorlos provides the naturally occurring bacteria with a continuous supply of the best alternative energy source to pure oxygen – nitrates. This eliminates the need for bacteria to target sulfate for energy, and the result is no holding tank odors. Accelerates the breakdown of tissue and waste, helping to prevent clogs. Effective even in extreme temperatures. Safe in all RV and marine holding tanks and septic tank systems. One ounce for every 10 gallons is all you need. Includes a 2 oz. scoop for easy, accurate measuring. 100% biodegradable/eco-friendly, formaldehyde free, CA compliant, and non-toxic. Scent-free formulatio
Cathy Bennett
Reviewed in the United States on January 21, 2025
I us this for the camper toilet. It works great
Wesley Dochnahl
Reviewed in the United States on January 21, 2025
I've been using this holding tank treatment for over 6 years in my boat and travel trailer. I never have an odor problem. I like that I can add a little or a lot as needed. After the tank is empty I use 2 scoops in the 45gal tank. I use my boat almost every weekend and add one scoop per/weekend. Never have a smell from the vent even thought its right next to the cockpit.
JP
Reviewed in Canada on August 17, 2024
Work well, no odours
KS Reyes
Reviewed in the United States on July 5, 2024
This is the best stuff out there to contain the smells in both the black and gray water tanks. Make sure you know your tank size and add the recommended amount and you will be thrilled with this product. It does what it claims and is priced so that it is a cost effective treatment plan.
Allen J Lafont
Reviewed in the United States on July 14, 2024
Used product to control rv holding tank odor, but didn’t control for a week, as expected. Odor started after 4 days, same time as other odor-control agents. Disappointing!
MISTY J
Reviewed in the United States on February 22, 2024
Great product but arrived with broken bucket lids and the little beads everywhere which also allowed it to get moist. Had to throw it away... but company took care of me, so that's the reason for the higher stars.
scooterdog
Reviewed in the United States on December 23, 2024
Works great in our porta potty. I put a small scoop- about 2 teaspoons in the tank and there is no smell. Glad I found this product.
becky r.
Reviewed in the United States on October 6, 2024
I've tried other, cheaper tank additives: pods, liquids, powders. I started using Odorlos 4 years ago on recommendation from an RV supply store saying they use it on all used units in prep for re-sale. I've use both the liquid and the powder odorlos and both do a great job of really removing the odor from my black tank. I tried another brand a few months ago and MAN, I won't make that mistake again! It's more expensive, but I hate black tank odors. Ick.
S
Reviewed in the United States on October 11, 2024
I know this stuff works well ! Its the only thing that works since the formaldhyde formula isnt available anymore. My order came damaged / leaking from poor packaging . I put it in zip bags
Karen
Reviewed in Canada on June 19, 2023
Used this past weekend, seems to work as well as that other HAPPY stuff.
Customer
Reviewed in Canada on April 17, 2023
Very good product.
Ron
Reviewed in Canada on December 8, 2020
This is the best for stopping odour.
dwaych
Reviewed in Canada on August 21, 2017
Good stuff. Been using it for years. Only 4 stars due to shipping packaging problem.
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