I'm doing 200micron to 100 micron socks. With the 200 inside of the 100. Then into a settling area in the sump. It then overflows/pumped/sprayed onto 2 different micron pads one on top of the other then down the bio media. Of course I also use a good sponge filter on the pump as well before it returns.
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What do you stock your tank with? And how often do you have to wash your socks? Do they ever overflow from being to clogged?