In this task, you're given a statement, and three sentences as choices. Your job is to determine which sentence clearly disagrees with the statement. Indicate your answer as '1', '2', or '3' corresponding to the choice number of the selected sentence.

Statement: we outgrew the need for that and so i used it for an aquarium Choices: 1. I used this to help the quality of where I keep my fish. 2. My fish love these improvements. 3. I'm not concerned with keeping water clean.
3