Thank you all, especially Bill Cody. Am familiar with rotary vane pumps. Yeah, my little pancake compressor has a short duty cycle. Probably not a good idea. I have built a lot of "Rube Goldberg" projects. Some work and some not-so-well. I like to play with some things.

Still looks like an easy to build diffuser heads and a manifold. Was also thinking about a garden hose and drill some holes in it. Pump air into it....... Maybe a soaker hose?

Another question is about how cycling the aeration. I hear "go slowly" what does this mean? Worried about doing it wrong. My lake has been sitting for about 75 years. Unlikely it ever had aeration.

Thanks,
Bill