Bill Cody, I dumped about 140 pounds of chlorine in my one acre pond to unsuccessfully try to rid it of tanins when I first built it. At that time it had less than 1/2 acre of water about 7 ft. deep. Finally I pumped it dry and let a Texas summer really dry it out. It stayed dry for about 6 months or so until spring rains filled it.
This is the first that I've heard of residuals. We've eaten the fish and, so far, haven't grown any extra fingers or ears. I think it would be wise for me to take a water sample and send it to Texas A & M for analysis. It would be ironic if I couldn't get enough to kill the tanins and it killed me.
