impur is that a nw200 or 150?? How does you get the bubbles to come out the cup like that?? Mine just like breathes at the top. Like it just goes up and down. Is my tank water really clean or something?? Also does length of the airline hose matter?? Is it better to get air from outside the sump??
Its the NW200. I didn't do anything to get the foam like that. I did the mods luke33 suggested, but i didn't cut the needles off, i just added 3 layers on top of the original needlewheel. You could just have a clean tank. The length of the airline does matter, the longer it is the more static pressure to get the air to the skimmer. I have to bring outside air into my skimmer due to excess CO2 in my house, this helps keep my pH stable and above 8.0. If I were to shorten the airline it would increase my skimmers performance.
Mr. Bojangles you can see the waterline in this pic. Its right under the black wire from the octo pump
I'd say my skimmer sits in 8-10" of water.