When I did it, I stocked to see what would happen. It killed everything within hours. Next, I tried experimenting with bleach. I added a couple of drops to a jar of the water and it cleared beautifully. Then I went to a swimming pool supply place and bought 10 pounds of chlorine, enough to sterilize 2 Olympic size swimming pools. Nada. 175 pounds later, I had changed the color slightly. I then pumped it dry and let Texas summer cure my problems.

I've seen it several times. Live, standing timber that floods doesn't cause a problem. Older, dried oak doesn't cause a problem. However, the tanins in fresh cut or pushed oak is a deadly toxin. It is used in tanning hides and, if I recall correctly, a tiny, tiny bit goes a long way.

Lusk once told me that in certain soils, the alkilinity is such that it doesn't cause a problem. I just don't remember the specifics.

It's not about the fish. It's about the pond. Take care of the pond and the fish will be fine. PB subscriber since before it was in color.

Without a sense of urgency, Nothing ever gets done.

Boy, if I say "sic em", you'd better look for something to bite. Sam Shelley Rancher and Farmer Muleshoe Texas 1892-1985 RIP Grandpa