Just curious, Did you lose any of your fish?
HL, if you were asking that of Jaymz, then you've seen his response. If you were asking me, no, I did not lose any fish that I could tell as a result of the watermeal die off. I think it happened slowly enough the first year that the O2 was able to keep pace. Last year, I hit the water after the other plants had emerged and a little before the time the watermeal had emerged the previous year. Again, because there wasn't a lot of established plant growth by that point, I think I was able to avoid a big O2 crash and, again, no apparent fish loss.