Black Tank what now?

So you are done camping and headed home. I have dumped my black tank at the campground and flushed it also. There is no water in my tank now and I arrive at home. Do I add some water and chemicals before leaving on my next trip in a month or leave the tank dry and add the chemicals at the start of the next outing?

+1 - I do not leave it empty. Plus the 2 gals and chemical will slosh around on next travel and help keep contents loose.

Always keep a gallon or two in there, just to prevent any residue from drying up and becoming a problem later.

I read, or heard somewhere along the line, that after dumping, add a new dose of chemical, or whatever you use, a gallon or two of water, and then put in a couple 5 pound bags of ice right down the toilet. As mentioned, the drive home provides the movement for the ice and water to scrub the tank, and automatically leaves liquid in the tank once it all melts. No matter which of these you choose to do, the worst one is leaving it dry.

Originally posted by mjlrpod I read, or heard somewhere along the line, that after dumping, add a new dose of chemical, or whatever you use, a gallon or two of water, and then put in a couple 5 pound bags of ice right down the toilet. As mentioned, the drive home provides the movement for the ice and water to scrub the tank, and automatically leaves liquid in the tank once it all melts. No matter which of these you choose to do, the worst one is leaving it dry.