Quote:
Originally Posted by Chin_Lee
I've yet to find a reliable check valve for saltwater use. the buildup of detritus and calcium carbonate always causes the check valves to fail over long term. Holes near the water line of the return is much more reliable especially if you get a stick and poke through the holes every 4-6 months.
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This is exactly what I do, but more often than every 4-6 months, probably once a month. I use a coat hanger which works pretty well. Since adding the filter sock though, it may get clogged less, but something more permanent would be nice. A larger sump isnt an option at this point 
Either way these are excellent overflows for those thinking of using one. I have had many comments on how quiet it is, and I am fairly confident in the case of a clog/powerfailure.
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60 Gallon rimless, internal Herbie overflow, ATI Powermodule, Eheim 1250, 2X Tunze 6055, Tunze ATO, Euroreef RS100, Profilux controller, TLF Reactor.
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