new to r2r and saltwater tanks, I have a 60 gallon with 20 gallon sump/refugium my calcium is staying constant at 500 and can't seem to lower it, all lps coral are doing great. Other parameters are 0 phosphates, 0 nitrates, 0 ammonia, kh value is 9.3dkh, alk 3.3 meq
High calcium
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sbash
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This is interesting.
First, let us look at the most obvious: your test kit. Do you have a control sample with it? It might be worth getting a second opinion (i.e. take your water to an LFS or get a different brand test kit)...
Next:
When was the first time you measured that amount, and when was your most recent test?
Are the LPS coral skeletons growing?
If so, how much in a month?
How long has the tank been up?
How often and how much do you do for water changes?
What type of salt do you use for said water changes?
Lastly, I might be missing something, but what is "3.3 meq"???
First, let us look at the most obvious: your test kit. Do you have a control sample with it? It might be worth getting a second opinion (i.e. take your water to an LFS or get a different brand test kit)...
Next:
When was the first time you measured that amount, and when was your most recent test?
Are the LPS coral skeletons growing?
If so, how much in a month?
How long has the tank been up?
How often and how much do you do for water changes?
What type of salt do you use for said water changes?
Lastly, I might be missing something, but what is "3.3 meq"???
Randy Holmes-Farley
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My Tank Thread
There's no need or desire to lower the calcium. 500 pppm is fine. 
