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Originally Posted by UnderWorldAquatics
this is why in aquaculture the utilize foam heads(mazei)(beckett) at the surface and not underwater
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actualy it is because they will not work underwater and by having it above the water you get the O2 from the bubbles and you ALSO get the O2 from the resulting splashing.
Bob, I am not saying the skimmer is a perfect airerator as then like your example "the tiny bubbles in a skimmer would never reach the surface because they would be absorbed." kinda think of the skimmer of using a buldozer to dig a hole for a tulip bulb. hit it with brute excess and get a little. infact when it comes to skimmers becketts are very inefficient compared to counter current skimmers but if you are only 30% efficient but process 1000% more water in the same time period, you get a better result.
for what its worth I only use the trickel of water from my aquaclear to add O2 to my fresh water tanks and there is very little surface movement.
Steve
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