I have a .62 acre pond and I run two airlines out and space them apart. That's plenty of air for just one diffuser. I've even run four airlines out to put a diffuser between two sets of four fish cages along with the two diffusers equadistance in the center of the pond and still had good bubble up flow at all points. I'd say you need to run two airlines out with a diffuser at each one. I also think you could have probably gotten by with a smaller compressor and must run one airline and diffuser.

I've run mine 24/7 but since I am going to be running two 1/4 hp. Gast rotary vanes in the near future I'm going to cut back on 8 hours a day and at night. Bill Cody says that is plenty of running time.

IMHO the fountains look nice but for practical purposes are pretty worthless.

If pigs could fly bacon would be harder to come by and there would be a lot of damaged trees.