Today I walked into the classroom, and saw that the aquarium was very murky. I realized this was because I did not have a water filter. so luckily Caitlin let me use hers. The reason I did not have a filter to start with, was because all of the websites a had visited, never stated that it was important to have a filter. But in the end of the day, it all worked out. Thank you Caitlin and Maira!