'Place your bird bath in a shady position as this will help to reduce algae growth and slow the evaporation of the water,' says garden writer, Flora Baker.
'Change the water daily to prevent build-up of algae and be sure to scrub the inside of the bird bath thoroughly once a week. A solar-powered pond aerator like this NFESOLAR Solar Pond Aerator at Amazon will help to keep water moving and any slime from forming,' she says.