Calcium 650ppm please help!!

[Art_Vandelay]

Well, I have been dosing calcium via liquid additive into my 155 gal tank because my salifert test kit was reading 350ppm. I added enough over two days to raise it to 425ppm according to the directions. I retested the calcium after two days... still 350. I buy a new test kit (salifert) and retest...now 650. I check calcium with two other test kits - red sea and API , both 650ppm. I guess my calcium wasnt 350 to begin with. Stupid, faulty test kit!
So basically I have way too much calcium in the tank right now. My ALK/dKh is 10.4. I'm trying to dose just alk right now to maintain it and not dose calcium. I also did a 10% water change. I assume the [Ca++ ] will fall on its own as I maintain Alk.
I guess my question is..... is 650ppm dangerous or detrimental to coral growth in any way? I know it can clog venturis and pumps but I'm more worried about my corals. Mostly zoos, leathers, few acros/montis (small to med size).
Advice, thoughts or concerns?

[cashyboy]

I would be doing alot bigger water changes, if this calcifies in your pumps or other equipment that would not be good.

[Reefer07]

That is pretty high but I'm sure it could be worse. You are going to have to do a lot of water changes to bring it down. What type of salt are you using.
Also, I don't know if you know about this but you could check this out from now on when you are dosing. It is pretty accurate.
http://home.comcast.net/~jdieck1/chemcalc.html

[hope2havareef]

I had the same issue with a Salifert Calcium test kit.

[Art_Vandelay]

<a href=showthread.php?s=&postid=14468779#post14468779 target=_blank>Originally posted</a> by Reefer07
That is pretty high but I'm sure it could be worse. You are going to have to do a lot of water changes to bring it down. What type of salt are you using.
Also, I don't know if you know about this but you could check this out from now on when you are dosing. It is pretty accurate.
http://home.comcast.net/~jdieck1/chemcalc.html
Instant Ocean... which I believe is the lowest [ca++]. Its down to 600ppm. Not sure when I should turn my calcium reactor back on?..... maybe around 500ish? Gonna do a few more water changes and keep maintaining Alk to 11.

[hope2havareef]

I'm using Oceanic. 580 ppm using my salifert calcium test kit on freshly mixed salt water. I haven't dosed anything to my tank for almost a year, and still reading in the high 500's. I would say this is a test kit issue.

[bertoni]

I'd let the calcium drop to 450 ppm or so. The tank should be fine. People have report higher calcium levels with no problems for the animals.

[Art_Vandelay]

thanks guys