gfo alternatives

[lastlight]

Thinking of dosing one of the commercially available lanthanum chloride products into a 10 micron sock. Anyone here do this and have a product they recommend? Or better yet a source for lanthanum chloride in concentrated form I can dilute? Products like seaklear for pools they recommend over on RC just can't be found here it seems. My goal is to make phosphate mgmt more wallet friendly. Thx!