You can also buy Book of Coral Propagation: Reef Gardening for Aquarists by Anthony Calfo from his website, I think its readingtrees.com or something like that. With the canadian dollar being so nice right now, its a pretty sweet buy!
Calcium reactor = works on alk. levels
Kalk reactor = works on Calcium levels.
I've always find the easiest way to get everything calibrated is to start with your calcium reactor, get your alk. where you want it. Then add on your kalk reactor (if you plan to). I've done it the other way, and it was really dificult to get everything dialed in correctly.
Just an FYI when your calcium reactor disolves its media it releases phosphates. You may want to keep an eye on that.
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