Has anyone used Phosguard in their octopus tanks? I've used GFO (granular ferric oxide) in my system without any apparent octopus health issues, and have some Seachem Phosguard that uses aluminum oxide to absorb the phosphate, but can't find anything about whether or not it's octopus safe. Supposedly Seachem's doesn't leak aluminum into the water like some older aluminum oxide phosphate removers do - Seachem often advertises that all their stuff is safe for all sorts of reef tanks, but I saw that their Flourish algae supplement has small amounts of copper in it so, I'm skeptical. GFO (Ferric oxide) is also metal based (which makes me nervous), so if anyone has info about using that with octopus, that would be useful too.
Thanks!!
Thanks!!