I would not want the bubbles coming up under a dock, especially if it were made of wood. The bursting of the bubbles could keep the wood moist and expedite the decaying process. Even if it were aluminum, I would think that the added exposure to drying water would add mineral deposits.

As far as aiding in the circulation of water... I think that forcing the bubbles to change direction at the surface to get out from under the floats could add some current, I bet it would be minor.


Fish on!,
Noel