Gary , Nice thread. I didn't know about lanthanum. Let me know if you use it and how it works for you. I'm not able to keep my phosphates under .15 lately. With a large system it requires a lot of gfo. I also feed well and have a substantial fish population and run a few refugia with chaetoprpha . I'm good on algae control but would like to do better for sps.Don't think I want to go back top carbon dosing.
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Tom
Current Tank Info: Tank of the Month , November 2011 : 600gal integrated system: 3 display tanks (120 g, 90g, 89g),several frag/grow out tanks, macroalgae refugia, cryptic zones. 40+ fish, seahorses, sps,lps,leathers, zoanthidae and non photosynthetic corals.
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