Well the pond catches alot of runoff and some chemicals. The algae blooms were very large and with lots of rain not a good mixture. We added some lime and got the ph down and seems to be working very well. got my fingers crossed.
I'll cross my fingers for you, too. It would be a shame to put time and effort into a BOW that was doomed to recurring fishkills, without first taking steps to remedy the situation, IF possible.
Otherwise, I agree with what's already been said....harvest what you can, while you can. In my opinion, the clock may well be ticking.