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I am seeing some new filter socks for my tank and I was curious if anybody happens to know what the micron count of felt is?
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Understood.My bad I said seeing I ment sewing some new socks out of felt from the fabric store lol
My question is
What micron rateing is Felt?

), so maybe she could tell you a bit about how she chooses which felt to use.@SandJ makes great filter socks out of felt (I would know...I have some in my sump! Thanks again!), so maybe she could tell you a bit about how she chooses which felt to use.
after reading through a bunch of diy filter sock tutorials, I saw most people buy the ecofelt from Joanna fabric. It does not have fire retardants, may say it is flammable on the label. I wash the fabric before cutting into socks.
