Foz Down vs: GFO

[George]

Originally Posted by Wheelman76

Lanthanum Chloride

thanks! that's what I thought.
I have been following LaCl in other sites for some time now. The only thing that prevents me from using it to control Phosphate is some people report of their fish (especially tangs) being irritated by LaCl or the precipitation. Does any one notice this issue?

[Aquattro]

I have a yellow tang that seems fine. I would expect my Moorish Idols to be more sensitive, but nothing from them either