Bill - the pond has constant out flow. I am in an area of KY with karst geology so lots of underground streams and springs. There are at least two springs that flow into the pond and they flow all year. I haven't done a flow test yet but it is a decent amount of water. The spillway on the pond was done poorly and it is eroding badly (and taking a power pole with it, yikes) and I would like to move it to an area that has less slope and was part of the old creek channel before the the creek was moved to the base of the hill back in the 1930s-ish. Would love to let the out flow go into a series of wet meadow, marsh type wetlands before it makes its way back to the creek. I'm not sure rotenone is an option as the outflow goes right into a small creek - that is full of small darters and dace I would rather not take the chance of killing. Right now there are some RES and BNCP in the pond, but not very many. All of the original LMB, SMB, CC, and HS are gone.

The SBS sound interesting. Could I have them with a few LMB or would it be best to just have the SBS? I read a bit about them and they are suppose to be 95%+ males so there shouldn't be any reproduction. I guess I just answered my own question about the LMB - there wouldn't be anything for them to eat! Any idea what species they cross to get the SBS?