I have a good sized water feature to drain and clean. It has many fish ranging in size from small to 2' long koi and fancy goldfish. The plan is to lower the water level catch the fish and put them into a holding pool until work is complete. Would I be better waiting until the water temps are warmer or is it better when its cold and they are less active? Water temps now are in the mid to low 40s. I did this once before in the summer 5 years ago, the fish were very active and tough to catch, didn't loose any that we caught. Lost a few sneaky fish that could'nt be caught in a reasonable amount of time.