Eric, I was just using my notes on the stocking and all of you bring up great points, I have a call into Donnie but he is out at present, The lifting numbers I provided are conservative as the pond is oval and I used a rectangular formulation, also the turnover is an avearge as is less as you get away from the diffuser(still plenty) which means upwards of 5-6 turns at the diffuser and less as you go out from there,The boil at the diffuser would be huge within a 12 ft area at that 8-9 ft depth with plenty of water contact to atmosphere. If I would of had a smaller system at the time I would of gone with that as this system is "plenty" for this pond.Things happen faster in small ponds both good and bad.Smaller ponds can be tougher to manage for this reason.I wish the visiting biologist would of got into this deeper as to say low DO is just the starting point to understanding the problem and not to mention the cure.If I remember correctly the lake at which we had the meeting at in Atlanta had a crash from a company putting phophates in the lake (by mistake) and causing a huge bloom and die off with a lot of dead fish if I remember Greg Grimes telling the story. That lake hade a huge surface area by comparison. If Donnies situation was dead fish normal DO then something toxic would be suspect and with that low of DO it had to be getting used up very fast as should of been in the 7-8 range. I work with a lot of similar ponds with very heavy fish loads and dont have DO's below 6 most of the time and this is measured at the bottom and the level will increase to 7 plus as the probe is pulled to the surface. I normally have 90 110% (windy days) at surface to 6 inch depth.
