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Re: Aquatic Plants Digest V3 #709


You are correct when you say I used a fairly high flow rate of air. 
Though I still had to have a uniform diameter tubing at a constant depth to 
produce relatively equal flow rates... I used a bubble counter to measure 
flow and it was within about 10% for all my containers. The reason I used 
a loop was so that the pressure remained constant between containers. If 
you run them in series, then each tank experiences a different pressure. 
This makes it just that much more difficult to equalize flow rates.