I've just bought Protozin to treat my 3 Cherry Barbs for 'White Spot' and started the first days treatment. The instructions say to remove any charcoal before use, would this also apply to activated carbon and should I replace it after the treatment has finished?
great advice, sunflower. rarely is it necessary to do waater changes while meds are in the tank. But if yoou need to then make sure you add the appropriate amount of meds to the new water before adding to the tank.