i used to use probuffer, but i got tired of the slow results. i switched to superbuffer and saw more immediate results. with superbuffer, you can control the amount of buffering salts per volume of liquid you add to the tank, unlike probuffer where you are stuck at a given concentration. i just add a teaspoon and a half to a 16oz glass of RO water, mix until clear, then pour into the sump. works great, results within 24 hrs! hope this helps...