ok so while I work on my purchase and build I have a difusser placement question. I have a large island and a small island in the shallow areas that turn into land in the late summer or around mid/ late july. I dont know when this pic was taken but this is the pond at the low time. You can see the large island, the small one is just up from the big one towards the inlet.

That said I see that islands can regulate where the diffusers go. I am planning two diffusers and THINK that I should place my diffusers where I have the yellow X marks as that area is equally deep in the deep side of the pond.

Any suggestion? And at this point I am thinking of building two diffusers each with two 9 inch discs on them. I have not found how many CFM EACH OF THESE DISCS ARE.



Usually the water level is at the yellow line mark for most of the spring winter and fall.