Abe,

I believe they carry it at CB Pets. Richard talked to me about it once. As I see it, the problem with it is that its a one shot product. It may get your phosphate levels down once, but it will just climb again after you feed. You might want to consider adding some sort of solid phosphate scrubber such as PhosGuard that you can run more or less constantly. I mix a fairly small amount of phosguard with my carbon and run it constantly. I changed it out weekly. Of course, adding a refugium is another option for phosphate control.