Ca 380, Alk 9, ph 8.2 - How to raise Ca?

[tbone28]

I have a 180g with many SPS frags. Currently dosing 100ml (each component) B-ionic daily, and have a Calcium reactor coming in at the end of the week.

I'd like to get my Ca up to about 420-450 before firing up the reactor.

Can I do a one-time big dose of the Calcium-part of my B-ionic to get the level up? I'd then go back to 100ml additions daily until my reactor arrives to maintain those levels.

Is it safe to add that much calcium at once?

Thanks