Originally Posted by Kurt_Nelson
Bumping up the Calcium the amount you're talking about shouldn't drop the calcium "through the floor". It'll probably be lower, but I bet once you get it where you want it your alkalinity will still be OK since you're sitting at 11 now.
I just started making the transition to reef crystals from IO. I did start dosing calcium and the alk
dropped to 8 in three days so i picked up a B-ionic 2 part and that brought both up nicely without affecting the PH, which brought the calc up to 400 and the alk
up to 10. I stopped the two part because I did a 30% pwc
with 50% RC and 50% IO, now the calc is 440 and the alk
11 with ph at 8.3.