Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to clean aquarium plants [title] Use your fingers. [step] Wash your hands thoroughly. Next, gently rub the algae off of plants while the plants are still in the aquarium.

Ending1: Remove any algae that you've rubbed off from the aquarium. [substeps] Once you have clean plants, maintain their cleanliness on a weekly basis by rubbing the algae off them while they are in the aquarium. Ending2: Begin slowly and rub the algae all over, particularly if the plant is clean. If you only have algae on the plants, simply blot the algae as off it and dry with paper towels. Ending3: [title] Fill a tub with cool or room temperature water. [step] Find a shallow bucket that's at least half-full with cool or room temperature water. Ending4: If you use your fingers, gently rub to scrub the algae, keeping your fingers in place. There is no need to use a vacuum or any other kind of abrasive animal-cleaning product, as the chemicals used in the cleaning and scrubbing process are harmless.

Answer format: ending1/ending2/ending3/ending4