hello,,,ive got a problem,,,here goes,,,i keep my water in buckets for a few days to let the chlorine dissipate but when its time to give them a feed the waters like ice,,,a few times in the past ive give them cold water and it cripples them,,,leaves twisting and curling everywhere,,,in the summer its not a problem but now its winter its a different story,,,ive been putting the buckets of water into a hot bath to get them slightly warm but this is a right mess on,,,does anyone know of other easy ways to heat it???,,,what about a fish pond heater???