Don’t need to water change. Get some nice in tank algae to keep nutrients from exploding and provide safety for the protist munchers and away you go.I havnt done a water change in weeks. I heard that made them worse. How often do you dose MB7. I have only been dosing 2 x a week but also vibrant 2 times and it has done nothing at all. Do you syphon daily or blow of rocks or add peroxide or just mb7 and phyto?