I would say about half the water was piped and half ran down 1/4 mile of rows. I have done both in the past with no issues but never the high percent of total pond volume that I did this time. I have flooded the rows at least 20 times since any chemicals/fertilizers would have been added but I haven't done it in about 4 months, I'm leaning towards the tanni acid over other chemicals. There are much fewer fish at the surface now so they are either dead or the DO is rising. I have pulled out about 60 dead fish, 95% are the largest from each species. I don't think many are floating and I can see some on the bottom out of reach of a net.

I am still spraying water over the surface with a water truck and we rigged the 3" water pump to do the same. I have a pondmaster AP40 that I amgoing to have running. Should I put the diffuser a couple feet off the bottom in the deepest area?

Thanks again for all the help.