Originally Posted by dwint
i just put my purple dottyback with cupramine and tested and it is 0.25 like it should.the directions say to repeat after 48 hours but the pet store says just do it once for two weeks.i think he is wrong.people with experience with this stuff could you help me out
What tested .25 ammonia? You don't want any, even in your qt. You can get away with this by running your sponge filter in your dt refuge for a few weeks before getting new fish.
I have a sponge on my return pump, that also fits a power head. That runs at all times, so if I need the qt, I move the sponge and replace it with my clean spare. After the qt is done, wash the sponge for next time.