Thanks! Yes went to the nylon filter socks. They seem to catch particulates but do see more detritus in the sump versus running the felt filter socks. Corals are slowly coloring up and things are turning around.So you're using nylon socks? Like the weave of media bags? I'm thinking to do the same for the same reason. But I have to use a bag because my drains make way too many bubbles. Too clean water is why I previously couldn't support acros and it's getting that way again. That's a gorgeous acro! Looks like some sort of Tenius.