Can you raise Ca and not your Alk?

[MattDaReefer]

So I have a mixed reef set bit of everything. Getting more into sps corals I've started dosing ESV 2part. Some people say to keep low Alk 7.5-8 for sps?? I had been keeping trying to keep Alk about 9 and Ca 420 min. After dosing 50ml. per day for 4 day my Alk is 8.8 but Ca. has gone from 360 to 380. I'm afraid if I keep dosing my Alk will be too high to get Ca up to 420-440.

Are there ways to effect Ca and not Alk?? Or just I keep the Alk in check and not worry about the Ca. I have great p extension and I'm happy with coral growth and color. How do you really know there is not written scale on for coral growth.

 

[madweazl]

You can dose the parts in different amounts until you get to the desired levels. Once there, you can go back to dosing equal amounts.

 

[Super Fly]

dose less Alk amount and Calc will increase.
u can use this calculator

Reef Chemistry Calculator