anon125ExplorerAug 15, 2014Tank odorsIn the past we stayed for several months in the same RV park in our MH. We used Exodor Bio-Pak drop ins for the black and gray tanks. Sometimes there was a horrible eggy smell when we dumped the gray ...Show More
bluwtr49Explorer IIAug 15, 2014Happy camper works very well in black tank. For the gray tank, add a small amount of bleach and let it fill....that should be that for some time.