Tom You should of been fine at that rate and you did calculate correctly "unless" you still had enough left in the water from the last dose. You can have new algae mats and still have AI left from the last treatment. And treating 4 acre ft for F-algae was the way to do it.Perhaps a high concentration was in an area where the carp were until it was diluted in the pond.It is very difficult to say. On the lite side perhaps since they dont eat F-algae perhaps they starved to death :)Ted
