As far as i know, its not imperative to use it a certain way. As it has instantaneous effect. I, and many friends, have used prime in every way described here. None of these ways is wrong. While it says up to 5 times the normal dosage is ok, ive seen it used, and have used it in heavier doses in cases of emergencies without ill effect. I personally use a 55gl rain barrel and keep heated prime treated water in it so theres no worry of how much and when. Before i had room for this, i used the standard 5gl jugs. I would change water on a tank. Refill jugs roght after im done and prime them. This allows them to age between WC's and leaves you worry free abt dosing for the next scheduled maintenance.
Prime Rocks. I want stock in it. Lol
Sent from my SPH-L710 using Aquarium Advice mobile app