help with sps turning white

[reef]

I recently began dosing my tank with kalkwasser. My calcium levels did not move until I began to dose all of my evap. water with kalkwasser. Most of my tank is doing awesome but several of the sps have turned white. I monitor calc. and alk. but not ph. Is it possible the ph turned several sps white. I have noticed that my calc level is at 470 and alk is a little low 3.0.

[Randy Holmes-Farley]

Possible, perhaps. 470 ppm Ca++ and alkalinity of 3.0 meq/l are fine values. I would suggest measuring pH.

How are you adding the limewater (kalkwasser)?

This article may be useful:

Reef Aquarium Water Parameters (a summary general article)
http://www.reefkeeping.com/issues/2004-05/rhf/index.htm

[reef]

I dose it between 11pm and 8 am I also have an algea scrubber that I run in a refugium opposit my day time tank lighting cycle

[Randy Holmes-Farley]

Does that mean that it is added slowly, by dripping or some similar way?

[reef]

Very slow by a 3gph pump that never runs more than 3 minutes and never more than one time an hour

[Randy Holmes-Farley]

That sounds like it would be fine. :)