I wouldn't suggest adding CA
to the water until you are in need of it. I use RC and out of the bucket I get 350 CA
so It's not as low as some thing.
While the tank is cycling and for the first several months after you aren't going to need a high CA
content. 350 or what ever you get right out of the bucket will be just fine.
When you get into SPS
corals and have a high CA
demand then you can look at CA
. It is more important to have a stable PH, SG
of 1.023-1.026 (Mine is 1.025) stable temp, stable Alk
. I have a heavily SPS
dominated system and I don't have to add much CA
to my system to keep it up. As long as my Mg
are good I don't worry so much with the CA