Not sure how effective that carbon filter is vs granulated tumbling carbon... and that per-filter will clog up realllly fast in my opinion requiring extra unwanted maintenance.
The best way to wash the carbon is when doing water changes... just turn off pumps, swap out the contents (GFO/carbon) then move the hose out of the sump and activate pump in the draining container... Once the water comes out clean, I'm good to go and move on sucking up detritus and other crap which i dont want in the aquarium for the remainder of the water.
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Casual reefer
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