Mike- you mean you add it during PWC
's? I'm using instant ocean and without any additional chems... i'm getting 300-340 calcium consistantly. I do have a bubble coral, green duncan that are doing great. I have a frogspawn that doesn't seem to be doing great... i was thinking it's the low calcium.
Anyhow this tropic marin stuff says it will NOT affect any other levels (particularly PH) and that it also adds 60 other trace elements... and I can just add directly to tank. So was thinking about just using this like once a week or when needed.