Mike,
I am afraid to advise you on what to do in this situation, other than aerate, to avoid a fish kill. You must reduce the bloom & in the future try to prevent excess bloom. I'm not schooled on this subject other than what I've learned here.
The only other thing I know that has been used with success is barley straw. It will reduce the "stringy algae" but is best used as a deterent rather than a fix.
Do you have any idea why you have the excess bloom this year if not last? Did you over fertilize? Is there runoff from nutrient rich farmland?
Look for the source of the excess nutrients contributing to the bloom & eliminate or try to control it.
BTW, if you have access to a volt meter make sure you have full voltage to your air compressor motor. A loose connection can cause low voltage which will also show up as the symptons you describe.
