Valterra Odorlos V77004 Holding Tank Treatment (168oz Bottle),1 Pack

I have used Odorloss on my boat for 15 years and still say it is the best product out there. It doesn’t seem to perform as well in the powdered for, so stay with the liquid. Every so often, I stopped using it because of the rave reviews some other product got, which I thoroughly tested before going back to Odorloss. It seems to stop odors in the tank and dissolve everything in it, including toilet paper. I only ran into clogs over the years when I switched products.

We learned about Odorless holding tank treatment when we had a houseboat. No Formaldehyde based treatments were allowed for holding tanks. We have used it for twenty years, in our houseboat and in our motorhome. Though I have many allergies and sensitivities to chemicals, Orderless holding tank treatment, this treatment has never bothered my breathing. There is absolutely no odor in the Odorless treatment and it completely eliminates odors in the holding tank.

It sounded great although some of the reviews were conflicting as to how well this product works. I live in my RV in Louisiana where it has been in the 90s for many, many months. The holding tanks are drained and flushed weekly. The manufacturer claims on the label "Absolutely no holding tank odors." That may be true for a few days, yet certainly not for a week. After a while, each time the toilet is flushed a sewer odor fills the travel trailer, although now that the weather has cooled the odor isn’t quite as bad. Maybe their stuff doesn't stink but mine apparently does. Oh well, back to the treatment that stinks yet not like sewage. Good news is the product does appear to eat toilet paper and solid waste if that's important.

Been using this product for a couple of years. It works quite well! We add it to our black tank when we get to our campsite. Then when we get home and we’ve emptied the black tank and we’re getting ready to take our RV back to our storage unit we add it again and put 2 to 3 gallons of water in the tank with it. We have no probs when we follow this method.

I haven't found anything that works so well for the black water tank. No odor in my RV and I'm in South texas so it get over a 100 degrees in the summer here. Great product!

This stuff is great. Holding tank odor not a big deal on the boat, and this stuff knocks it completely out. Sometimes a little odor will waft down from the vent near the bow, but no longer with this product.I got a lot of information from the book “The New Get Rid of Boat Odors” by Peggie Hall. It was one of her recommendations.

I am beyond estatic to finally find a product not loaded with toxic chemicals that actually works to keep the odors at bay in my 10 liter tank portable toilet. I have tried almost every other product on the market and the only thing that worked in the past was the toxic blue formaldehyde laden products.This is the first formaldehyde free product that I have ever used and did not detect any odors in my portapotty after a few days.

I ordered the dissolving tablets in a waterproof package to ensure dry product with no potential for leakage or mess on a boat (and nothing to dispose of after use). What I received is two damaged cardboard boxes of product packets scattered in the envelope to tear open and dispense. I love the product but I really DON'T love receiving the wrong application and packaging.