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If you're already building skimmers, why not build the airstones? It's just a chunk of wood. Make it a proprietary size/shape that needs to be purchased from you. Then, wait for that sweet, sweet airstone money to roll in.
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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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