They arrived about a week ago but I waited a few days to rotate them in since I had just put on clean felt socks the day before they came.
They are 200 micron (actually it looks like BRS doesn't sell anything BUT 200 micron) so they definitely last longer. The material feels like a sort of stiff nylon.
I have a bit of a cyano thing going on so they got clogged once already but I all I needed was to rinse them off and they were fully clean so I just put them back in instead of rotating in different ones.
Definitely getting longer between cleans, the felts I was using are 100 micron and I'd only get 2-3 days before the water was overflowing from the top.
I have sock holders in the sump so I got the ones with the plastic ring.
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-- Tony
My next hobby will be flooding my basement while repeatedly banging my head against a brick wall and tearing up $100 bills. Whee!
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