I have only done it in the Fall because it seems like they are hanging out in the warmest part of the pond which is about 3-5 feet deep at the narrow end of the pond. Mornings and evenings seem best. Not sure but think it is an 6-8ft cast net.

This year I had them feeding on pellets a little which helps lure them in. They are quick though so try and keep the throw low as possible.