Reefer35

Thank you very much for the replies. They are both helpful.

Ive had my reef tank for about 9 months. It's the third tank I've had over the years, all sps previously. For some reason I cannot get the calcium up. Its a 40 breeder and I dose with c balance. pH is 8.4 with a dkh of 12. My calcium tests between 340 and 360. Also this particular tank has not been stocked with any stoney corals. The Monti cap and acro that I did introduce died within 6 weeks. Currently there is only a small Duncan. Any help would be appreciated. Thanks