A fountain can stop working if excessive debris gets caught in the fountain’s pump. Debris such as leaves, algae and animal matter will obstruct and clog a pump if the debris is not removed from the water. Owners of ponds and pool surrounds can prevent their fountains from becoming clogged up by using a pond filtration system that strains debris. This system is how dirt, leaves and debris are filtered out of the water to help to keep it clean. It works by sucking in the water, cleaning it, and then pushing the filtered water back out into the pond or pool surround.
Another solution that can be used separately or in conjunction with a filtration system is to use a pump mesh/shield, that can be purchased relatively inexpensively from an aquatic specialist. One example of this is the versatile Oase Pump Shield, which is a large plastic mesh bag which you can use to house your pump. The bag measures 500mm x 500mm and is made from strong, wildlife-friendly plastic with a small 1.5mm mesh size to prevent small particles or creatures such as newts, tadpoles and fish fry from becoming trapped. It is suitable for most filter and fountain pumps, and can easily be fitted and removed.