the bear II wrote:
When setup at a campground there's no need to use chemicals. Remember to keep the valve closed not open. If you leave the valve open you will end up with solids that will eventually clog the tank.
I always add a packet of Thetford blue powder once I have dumped and ready to hit the road. I add several gallons of water. I figure this will slosh around in the tank as I travel to help keep it cleaner and the enzymes in the Thetfords will help break down any solids to liquid.
I do the same when I'm getting the trailer ready for a few months storage.
Great advice, with one addition: use A LOT of water! The GEO method is ideal, but it's more work, and a little more research is suggested before going GEO. Stuff lmade by Tetford, or Camco is easy to use; something like this will be perfect for a first trip.
Use a lot of water!