Detailed Instructions: In this task, you're given a four sentences of story written in natural language. Your job is to complete end part of the story by predicting appropriate last sentence which is coherent with the given sentences.
Q: Sentence1: Jeff went downstairs to clean his saltwater fish tank. Sentence2: There was a lot of algae growing on the back of the tank. Sentence3: He used a scraper to loosen the algae. Sentence4: The fish hid in the decorative structures on the bottom of the tank.
A:
Jeff used a net to collect the algae and the water looked cleaner.