liquidsquid - makes good insightful comments about the negative features of using chlorine in ponds. I agree with his comments, it is not a good idea and his comments. I would only use a chlorine based treatment as a very last resort and only in a minimal amount of water volume. Remove as much water as possible before any fish kill treatment. No matter what fish kill method is used, the best practice IMO would be to first dewater the pond so the cost is less and there is minimal impact on the pond ecosystem. Plus with minimal water in the pond, the pond water quality will recover much quicker for a restocking of fish. Remember you will want the pond to be as healthy as possible with low chemical residual and less long term impact after the fish are kill.
