Special Note: Solar bird baths require plenty of. Please be sure you have a sunny spot to place your solar bath or fountain. The ideal bathing depth for birds is 1.5 to 2 inches.
You can simply fill the bath with 1.5 to 2 inches of water, or you can take the decorative approach and use polished stones or similar items to raise the water level while keeping the bird safe. For best results, place in areas with exposure to sunlight.