We have put out Rotenone on ice beforoe it just takes a little while longer for it to "clear" but would be fine by the time you stock other fish. I suggest use of trash pump also but I never seen it get enough water out to rid of all fish. However the less water you have the less checmical you need and the less chance of surival. You can catch out the few larger bass and hold on to them? Also there are chemicals that will work besides rotenone. IN fact you can not put out roetnone unless you have a restriced use pesticide license. I do not but know many folks that use bleach (chlorine) and it works fine but also not legal except for HTH brand is registed as fish toxicatant.

Greg Grimes
www.lakework.com