Black tank chemical

I'd recommend a tank flusher after each use, if your rig doesn't have one

We use nothing but plain water and have no odor issues.

I don't us any chemicals and never have a problem.
By the way formaldehyde based tank treatments are banned now.
Bill

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 haven't used formaldehyde based tank treatments for years and wouldn't as I see no need. I've tried a variety of products but for the last year have been using black and grey tank products by Walex and have had zero issues with tank odour.

Plain water or the Geo Method.