Good luck with this. I've tried a few different designs based around the flapper style, and it was a never ending headache. I could get it to work for a day, then the flapper would either stay open or get stuck closed. There is a lot of abuse going on inside one of these, and something invariably fails, at least with the bubble-less style surges. Keep trying, but test, test, test, then test again before designing an entire tank around this.
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Time flies like an arrow. Fruit flies like bananas.
Current Tank Info: 78"x36"x27" acrylic, 6 Orphek Atlantik V3+ Compacts, MRC Orca Pro II w/washdown, CalcFeeder Pro AC3, Emperor Aquatics 80w UV, 80/20 aluminum stand, Vortech MP60's, Theiling Rollermat, GHL Profilux 3.1T EX, Kessil H380
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