No, you use it to dose the water for your water changes.
You should be doing partial water changes (pwc
) at least once a week. The new water you put in the tank should be dosed with some kind of dechlorinator to remove the chlorine, chloramine, and ammonia from your tap water. The good thing about prime is it also detoxifies the nitrites and nitrates that are currently in your tank.
Have you tested your water today?