Black tank chemical

filrupmark wrote:
I have used formaldehyde based chemical in our black tank for many years with no issues. The brand I have been using is getting hard to find. We don't like the formaldehyde free stuff. What do you recommend.

I recommend nothing at all. If you flush properly after each trip you shouldn't need anything. I used to buy into the hype that you had to add stuff to your black tank but quit using anything after extensive reading here. I haven't used anything in three years and have had no problems......I have three words for you flush, flush, flush.