シーケム フォスボンド

My phosphate levels dropped from 0.5 to undetectable in just three days after adding this to my canister filter. The high surface area really seems to make a difference.

The high porosity really does the heavy lifting—I swapped this into my filter media bag and didn't touch it for three weeks while silicates stayed undetectable. Water's crystal clear and my corals finally stopped looking stressed.

My tank's phosphate levels finally dropped after a month of using this stuff, and the granular form let it settle in the filter without clouding the water. The high porosity really seems to pack a punch for its size.