To preserve finish avoid rubbing concrete with any abrasive material.
To clean algae from surface use bleach and a plastic bristle brush or sponge if necessary. Rinse with water.
Do not allow water to freeze in any concrete statuary item. For Example: Fountains, Bird Baths, Planters, Figurines with Dishes, etc.
Recreational Vehicle Antifreeze can be used in fountains to prevent the water from freezing. Moving water will still freeze so if you leave water in your fountain you must use the RV Antifreeze to avoid freezing. RV Antifreeze is tasteless, odorless and non-toxic when used as directed.
Manufacturer recommends all statuary be placed on a raised surface to avoid freeze-thaw deterioration caused by accumulation of moisture between the bottom of statuary and the ground.