what speeds?

it does seem that the spurts in the return are related to the swg. whew.

as far as pump basket bubbles, that all seems well and good. so i'm guessing what looks like a low water level (meaning the bucket has the top of impeller input tube at 1/2 heigh and the water's roughly 3/4 height, with either a huge honking 1/4 height bubble or just not enough water, is normal at low enough speed?
 
As long as the air does not reach the impeller inlet, you are ok. But if you run at higher speed for just a few minutes a day, that should take care of it.
 
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