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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??
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Leo
Click on my red house to see my 90g RR tank :) Tons of pictures, tons... Click!!!
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