It's a Lanthanum based product. What it does is precipitate phoshphate out of the water. So it doesn't actually remove phosphate since it is still in your tank. It may be released again later or the precipitated po4 may still be bioavailable to some algaes.Originally Posted by SoLiD
I've heard of mixed results from it. It seems to irritate some corals/inverts. Here's a review with more info...
http://www.reefcentral.com/forums/sh...ght=phosbuster
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