<a href=showthread.php?s=&postid=11145399#post11145399 target=_blank>Originally posted</a> by melev
I've used many bottles of Phosbuster Pro in my tank over the past two years, and it will bring PO4 levels to 0 overnight.
It is a flocculant. It is best to boost up alkalinity 10 mins before dosing this product, and I prefer to use it at night when the fish are sleeping. Using a length of PVC pipe, I point the end at the intake of my return pump and pour the liquid into the PVC. It mixes as it pumps into the reef, and the water turns cloudy.
The next morning the water is clear and the phosphates are 0. I've never had any losses using it, and like it more than using GFO. Just my personal preference.
The stuff Blue Life sells (Lanthanum chloride) is dosed by the drop, and I've not tried it yet. However, I love the idea of dosing it one drop at a time in my skimmer, every 10 mins. Turning that water's PO4 to a solid would keep it trapped in the skimmer and collection cup, rather than have it do its thing in my reef. It would take longer dosing it every 10 mins, but I'd like to try it at some point.