I have just drained my 2 ac. pond and am getting ready to put a clay and bentonite liner on the bottom to hopefully seal it and stop the leaking. We had to make a couple of dams on the springs feeding the pond and i noticed today one of the pockets of water had thousands of bullhead fry. There is also a 2 feet deep portion at the dam.

I want to make sure that all fish are dead in any pockets of water before i start refilling it and moving the fish i saved back into it.

What can I easily get to put in the water to kill any bullheads that may escape death during construction that will not adversely affect the pond as it refills? I hope this question makes sense.

I want no leftover fish such as bullheads to contaminate the pond.

Thanks.


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