Black Tank Question
We are new to the RV thing and I had a question on Black Tank. We took it on our first trip a few weeks ago, drained it and didn’t think anything of it. So we went back out this weekend and upon getting everything hooked up I checked the tank levels and it said it was already at 1/3 full. After the weekend it was saying 2/3 full. So drained it and then ran my hose down the toilet to get an extra flush. So I checked the level again and it still said 2/3 full? The gray tank is reading properly. It drained an awful lot as I drained the black tank before I emptied the gray tank. Any ideas on what could be causing this? Thanks