Air Stone - 75mm
thingiverse
I modified GBDave's air bubbler to make it half as wide for an algae scrubber project I've been working on. I haven't printed it yet, but when I get it installed, I'll post a picture of it. I'm also considering adding mounting holes for suction cups with zip ties to hold the bubbler in place. Edit 2/5/2020 The design has undergone a total redesign and now works perfectly for me. I added loops for small zip tie suction cups. When it's installed in the aquarium, I'll post a picture of it. I used PETG, with a first layer thickness of 0.3mm and a layer width of 0.35mm.
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