the single active ingredient in powder "ph up" is sodium bicarbonate aka baking soda. so if u want to raise it and just keep an eye on it, baking soda is your buddy. think the dose is 1/4 tsp per 10 gal. let it dissolve for a few good hours and recheck. add as necessary. BUT if u want to set it around 8 or 8.2, i always mix in some aragonite (finer than crushed coral, better for sifting)
just my .02