200 micron felt socks trap more organic particulate than 200 micron mesh socks. The plastic mesh screen rating system is totally different from than felt material rating system. Very confusing when compared to each other.
200 Micron felt socks trap particulate floating in the water down to 200 microns. If filter socks are cleaned often then the trap particles are removed from the water and do not break down further into Nitrate and Phosphates. With mesh socks, they are not made to trap small particles. The larger items such as plants, snails, fish, etc and keep them from being sucked into the pump.
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