i find it easier to catch fish on the cast net at night. we have a local warm spring here where people release their exotics and i seem to do better at night. probably because the fish are sleeping and not aware of the net til its too late.
i've caught a bunch of convict cichlids, texas cichlids, plecos, catfish, turtles, goldfish, mollies, and even a silver dollar.
i wish people wouldnt release in that warm spring though cause now the desert pupfish is extinct from that certain spring. too late now though the cichlids and mollies have already established themselves and have been breeding for probably 15-20 years now.