[Daddyrawg]

anyone have a link on how TTM works? I get the 2 tanks thing and transfer fish every 3 days, I guess my question is when you transfer fish from old tank to new tank are you supposed to discard old water from tank that fish is removed and replace with new water? if I have a 20 gall and a 10 gal and I have to keep replacing water I guess that can add up ...

Thanks