OK this is in my ball park

the blue life and a couple other products work excellent as a treatment but after two days of the treatment you need to do a 30% water change this is required if you do not your tank will be way out of wack and remember it is a poison it is not anything that will effect your tank short term but long term it can cause a total loss --- jost like some meds that we get as humans they get read of are cold but if you took it every day it would kill you