As some of you know I have started building some ponds on my place. I see a lot of postings here about Electroshocking surveys. My question is can this be done with the old style hand crank telephones? I have one because I am a telephone man by trade. I have never tried to use it before but it does create juice when cranked. Would this device do the same as the equipment the pros use? If so what long-term effect would it have on the fish?