> Uh Oh. Here we go again on that calcium thing. I remember how the
> discussion of calcium perked things up here the last time it was
> discussed. Actually, I find the topic rather interesting. I have
> crushed coral in some of my power filters with good results.
That should work. To a first approximation, fish can get calcium across
both their gills and across their guts. Phosphate comes across the gut
almost exclusively. Vertebrate bone is made of both calcium and
phosphate.
That is my recollection of the previous thread.
Craig