Stop trying to modify pH with chemicals....a losing proposition.
Unless you have a really specific reason (let us know), there's generally no reason to be all that intersted in what your pH is. Good husbandry (including good aeration) will ensure that. In other words, regular water changes with an appropriate salt, and if you are growing leather or stony corals, some two part or kalkwasser dosing.
And use a good alkalinity test kit like Salifert combined with your dosing product's instructions and/or the
Reef Chemistry Calculator, to know exactly how much to dose. Eventually, as corals grow in and get bigger, you will at least have to dose daily...at first, when frags are small and fewer in number, weekly is probably fine.
If you aren'y keeping leather or stony corals, then there's even less need to worry about pH or alkalinity and you can focus more on nitrate and phosphate management. Keep your bio-load light and it will stay an easy job. (Which is even better for your animals than it is for you!)
-Matt