ive been running lots of diff styles of sumps and a filter sock helps out a lot catches big particles and keeps my skimmer cleaner longer, yes skimmer get dirty inside stuff settles at bottom and will start to build up. skimmer should always be in a static chamber where water table doesnt change. i run a cube shape sump the past two tanks water goes into first chamber and flows into second through cut ou in divider wall. second chamber up front is for bare bottom fuge, by running bare bottom i can grow more macro and i can clean it easily. the first two chambers share water table because second chamber over flows to return pump area with a media basket there( but i dont use it).. the one i run on my 150 is the same just bigger and dual sock holders.
"TEFLON DON"
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