Having the 2 diffusers at different depths and with different length of air line will require ball valves for each diffuser to adjust the volume of air to each.

If the pump will handle the pressure I'd put the summer diffuser in the deepest part of the pond, and maybe both of them if the one diffuser won't move enough volume of water. Then for the winter (if your pond freezes over for any extended length of time, or it freezes and you get a few inches of snow on it) I would have one running at the 5' water depth mark.


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3/4 to 1 1/4 ac pond LMB, SMB, PS, BG, RES, CC, YP, Bardello BG, (RBT & Blue Tilapia - seasonal).