Having an issue with the smell from your black tank? I know it can be a bit frustrating when you have tried so many things to help but are limited on what you can use as well.
I use a couple things to help with both smell and break down and it seems to be working very well. I use Thetford 32947 Eco-Smart Enzyme Formula Holding Tank Deodorant, 36 oz. for the enzyme break down and also has odor control. I also put in a couple capfuls of Downy April Fresh Liquid Fabric Enhancers, 170 oz. … Who doesn’t love the smell of Downy! It does really work and also helps with keeping “stuff” from sticking to the walls and sensors in your black tank! It’s a win win! Also Downy is biodegradable, and will not harm any seals. I have tried the cheaper fabric softeners…but they only work for about a minute.
Happy trails, and happy smells!