Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to clean a saltwater tank [title] Remove uneaten food. [step] While you should only be feeding the fish in your tank enough food for them to consume within an hour, there may occasionally be food leftover. Take a net and skim the uneaten food out of the tank.

Ending1: Do this an hour after you've fed your fish. [substeps] If you leave uneaten food in your saltwater tank, it can decay and make the water cloudy. Ending2: Eat or discard the uneaten food. Repeat the process five to 10 times if they have a long-shelf life. Ending3: Next, remove any uneaten food by piling it in a plastic bag (or lining it with newspaper). Fill it with fresh water (tap water is usually better) and use a dry sponge or soft brush to sweep away any remaining food. Ending4: [substeps] If any food remains, wipe it down with a clean paper towel or throw it away. It can also be a good idea to scrub the tank afterwards with a sponge or brush.

Answer format: ending1/ending2/ending3/ending4