Black tank treatments.

Agree with Thetford Aqua-Kem, it just plain works. But it works because it contains Methyl Alcohol and Formaldehyde, which I think is bad for my septic tank at home. So if I'm going to dump at home or in another septic tank, I use Thetford Campa-Chem, which sort of works unless it's real hot. It is "Formaldehyde Free!" according to the label. It contains Bromo-Nitropropane-Diol and surfactants. I guess I should find out how that affects a septic tank!

We just use Thetford Aqua-Kem. I’ve tried other stuff, but we like the smell of the blue stuff more than smells created by the other brands.

"Happy Camper", been using it for 5+ yrs, no problems and makes me a Happy Camper.. also, occasionally used in Gray tank, just mix with water and pour it in...