Shan; Thanks, I've been wondering about that. I had 2 DO crashes in 2 years that I know about. It happened both years on highly fertilized and therefore highly productive ponds. Everything seemed to be going well until I got 4 or 5 warm, cloudy days. I think I now understand a litle bit more about it. I now no longer fertilize but question whether I'm getting as many good spawns. However, so far this year I haven't had a O2 crash.
