I love my surge device, but the bubbles *are* present and short of a few complicated tricks (there are a couple of solutions on RC now, I see), you won't get rid of them. With clever powerhead placement, however, you can make the surge actually form a wave head that sweeps across the tank in a pattern that sends the bubbles harmlessly to a side. Once the full strength of the surge overcomes the powerhead, the bubbles are gone and it's just motion flowing around the tank. I think it's probably the most natural water motion I've ever seen.
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