• Mobile App For Android Now Online!

    Download it here. The app is searchable in the Google Play Store under Sailboat Owners.

    Sorry iPhone/iPad users, we are still waiting on Apple. :(

    Click the X in the upper right corner to make this go away

Portable toilet additive

Sep 13, 2021
35
Hunter 240 Lake Jacomo
Okay, I searched but am not getting a clear answer. I’m still confused by the shear number of choices for a treatment chemical for a portable toilet. We just bought a Thetford 345 and I don’t know what I should add to the waste tank. There are so many choices. We plan to only use it for #1 unless it’s an emergency. Please help. Thanks!
 
Dec 2, 1997
8,087
- - LIttle Rock
Because portable portapotties have sealed (unvented) tanks, the most popular holding tank products won't work in 'em. Most of the Thetford products are lethal chemicals that don't do much more than add a chemical odor to the sewage odor. So you may have to try a few of the others to find one that you like. I suggest you start with Odorlos...its active ingredient is nitrates, which promotes oxygen release from organic matter--essential in PREVENTING odor--and is also environmentally environmentally friendly. It's available from a few marine retailers, but you'll find it for a LOT less in RV supply stores.

There's no reason to avoid putting solid waste in your portapotty.... contrary to popular belief, urine is NOT sterile and can be just as stinky as solid waste. Besides...solid waste is 75% water and dissolves in water very quickly.

Nor is it necessary to avoid flushing toilet paper...it just needs to be "quick dissolve" TP. That doesn't mean you have to use over-priced "marine/rv" TP though...almost any of the cheapest no-name stuff will work. There's a simple test to find out if it's ok for use in a marine toilet OR a portpotty: tear off a couple of sheets and put 'em in a glass of water. Come back in an hour and stir the water. If the water is "milky" and all you see is "snow," it's fine for use in any marine toilet/potty...but if the sheets are still intact or mostly intact, try another brand.

--Peggie
 
  • Helpful
Likes: rgranger
Jan 19, 2010
9,953
Hunter 26 Charleston
...its active ingredient is nitrates, which promotes oxygen release from organic matter--essential in PREVENTING odor--and is also environmentally environmentally friendly. ...
This is true-ish. Nitrates are not considered toxic per say but nitrates are a primary ingredient in fertilizer and combined with urine and solid waste make a powerful sourse of nutrients.... and if allowed to escape into an watershed can lead to algea blooms and other eutropification events. It is already a bad idea (and illegal) to discharge close to shore but with nitrates added it is even more wrong.

Sorry .... that sounded very preachy... :frown:
 
Sep 13, 2021
35
Hunter 240 Lake Jacomo
This is true-ish. Nitrates are not considered toxic per say but nitrates are a primary ingredient in fertilizer and combined with urine and solid waste make a powerful sourse of nutrients.... and if allowed to escape into an watershed can lead to algea blooms and other eutropification events. It is already a bad idea (and illegal) to discharge close to shore but with nitrates added it is even more wrong.

Sorry .... that sounded very preachy... :frown:
I'm an inland lake sailor with no intentions of ever disposing of anything anywhere other than in the marina toilet or porta potty. The reviews on that Odorlos sound really good, so I'll try it out.