More Bioavailability in Hydroxide or Chloride

[irish1028]

Dr. Randy
I have searched for a thread on this topic but to no avail. The best I can figure(correct me if I am wrong) is Kalkwasser if you want to raise PH and add Bio-available calcium and Calcium Chloride if you just want to Calcium levels. Does one solution offer more calcium to the organisms than another?
Thanks
Irish

[Boomer]

The calcuim is the same in either form, Ca++. In some system the kalk can do it all, same for some two-part sups. It depends on the demand of the sytem for both. Some system may require both. Calcium chloride should not be added as a supplement but itself, but kalk is OK. This should help your;

How to Select a Calcium and Alkalinity Supplementation Scheme
http://www.advancedaquarist.com/issues/feb2003/chem.htm

A Homemade Two-Part Calcium and Alkalinity Additive System
http://www.advancedaquarist.com/issues/april2004/chem.htm

[Randy Holmes-Farley]

Thanks, Boomer. :)

Just to harp on the most basic point: the calcium is the same once dissolved, but limewater adds alkalinity and raises pH and calcium chloride does neither.