I’m planning to treat my tank mainly for flukes and I’m wondering shall I reduce tank volume while I treat ? I’m thinking if I half my water volume before I treat when it comes time for the second dose I can do a 50% top up and re treat the whole tank .. reason why is I hate chemicals and I’d like to be adding a substantial amount of clean water to the tank as I treat . Would this work or is it a massive faf about to achieve the same thing?