Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to keep your pond clean [title] Clean your pump's filters out regularly. [step] Most filters require cleaning once each week. Usually, cleaning is a simple matter of removing the filter, spraying it down with a hose, and replacing it.

Ending1: If you notice any signs of issues, like improper cleanings, loss of power, or blockage with the water meter, clean it out. [substeps] You can purchase automatic filter cleansers at your local hardware store or online. Ending2: However, you should always follow the manufacturer's instructions when deciding how and how often to clean your filter. [substeps] If you notice your pump leaking or struggling noisily, you probably need to clean it. Ending3: If you do not clean the filter regularly, you may accidentally cause an economic strain on your water supply, which can lead to major health problems down the road. [title] Remove water from your pump after it stops running and replace with fresh water if it is dirty. Ending4: Sometimes, cleaning due to an accident can only get you so far. [substeps] Decide on a cleaning schedule that works for you and your pond.

Answer format: ending1/ending2/ending3/ending4