I was getting ready to use this new water water treatment chemical (Sea-Zyme) and it says to clean your tanks prior to use.
We are heading out on a trip tomorrow. The sloshing of the water will clean your tanks and the drain them when you get to your destination. Then add the new odor eliminator.
The procedure is to fill your water tanks 1/3 and add 1/3 Dawn Original scent dishwasher detergent to each tank. I poured 1/3 cup Dawn in kitchen sink and filled the tank till it read 1/3 full on the galley side. Went and did the same thing in the bathroom thinking it would fill the bathroom tank. WRONG
It kept filling the galley tank. Pretty soon there was water backing up into the galley sink.
The bathroom grey tank only holds shower water.
Something else learned.