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Trigger delay
attach the fresh media and you're ready to filter
Relay ON when the signal disappears after delay time CL
Look no-further
There are two ways to get the perfect filtering replacement for felt or mesh filter socks:
3-1/2" Filter Sock Cup - Filter Sock Replacement System (RedSea 250, 350 and 525) frag Trigger delayFilter Sock cup for 3 1 2" Filter Sock holders (RedSea 250, 350 and 525 aquariums). Getting tired of dealing with those gross filter socks? Look no further Tested on RedSea 250, 350 and 525. There are two ways to get the perfect filtering replacement for felt or mesh filter socks: Complete: Use some filter floss. Cutout a disk of filter floss Tuck the filter floss into the cup then top' with other media like filter fiber or keep them plain; any way