SparKy697, thanks for link. An Improved Do-it-Yourself Two-Part Calcium and Alkalinity Supplement System by Randy Holmes-Farley - Reefkeeping.com
I am wondering if anyone has had any experience in this. I cannot get the calcium chloride preparation described in the web page; however, I can get 'damp rid'. Damp rid is 80% Calcium chloride, with Sodium chloride, and a few other things. It is the few other things that I am unsure of, I would appreciate any feedback.
melosu58; at the moment my calcium requirements are not too high so I thing that with your suggested water changes the calcium levels will be ok. I am concerned however, when my calcium requirements increase over the next 6 months that the water changes may not be enough!