You want to maximize the total surface area of the bubbles and their contact time with the water. Smaller bubbles have a larger surface area relative to their volume and they also tend to take longer to migrate upward to the pool surface. So use the largest output (volume of air) you can but produce the smallest bubbles from that output possible for the best combination. That probably requires a type of nozzle you don't have since the smaller nozzle probably restricts the output rate. The ideal nozzle would be one that had many small nozzles to produce lots of tiny bubbles (I can hear Don Ho singing now).Originally Posted by sevver
If you only have a choice between a large output rate with large bubbles vs. a smaller output rate with smaller bubbles, then I agree with the earlier post that the larger output rate is probably more important.
Richard
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