Calcium demand question

[marie]

Never mind, I posted this same question on another board and happened to look at pictures of my tank, taken back in oct. There is some amazing growth happening. I see a bigger calcium reactor in my future
This picture was taken in oct

[dirtyreefer]

Tank looks great Marie. I'd check Mg as this could be the reason why your Ca isn't able to stay stable. Up your Mg, and your Ca should probably stay up there as well