シーケム フォスガード

My nitrates were stubbornly high until I added this. The spherical beads flow really well in my filter bag, and after three days my phosphate test finally showed zero.

I was tired of fighting silicates clouding my freshwater tank, and this stuff cleared them up in just two days. The irreversible binding gives me peace of mind that it won't release back into the water.

I was skeptical about the spherical beads making a difference, but the flow through my canister filter is definitely more even now. It cleared up my phosphate issue in about a week, and I’ve noticed less algae growth on the glass. My only small gripe is that it seems to clump a bit if you rinse it t