i have a 120 and a 30 gal, in my 30 gal my lobster died and i was away for xmas for 3 days when i got home my whole house smelled so bad the water was so cloudy i couldn't see the bk tank wall, anyways i did 3 water changes that day and the smell was still there i couldn't get rid of the smell, 3 of them died cause of the water, so i took all fish and put them in a 20 gal i borrowed i drained all water and then refilled tank, and the smell is still there, i talked to the pet store, they said since the fish are all out i can take a couple cap full of bleach and pour it in tank and that take care of the smell, can i do this and if i do, do i have to drain all water again to fill it bk up or can i wait a few more days and put fish bk in the smell is beyond the smell of death makes eyes water