Quote:
Originally posted by reefkeeper2
This is a pic of the schuran calcium reactor. I feed it into an old Koralin reactor that serves as a second stage. I had it lying around so I figured I might as well make use of it. From there it goes into the sump. However, first I have the effluent bubble up through a cup of GFO since calcium reactors have been shown to contribute significant phosphate.
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so you have two ca reactors connected in series? How do they add phosphate? Is there phosphate in coral skeletons?