2 hour presentation

At this point I am pretty much ready to go with my 2 hour. The only thing I have left to do is figure out what activities I am doing for my second and third answers. They are "Keeping the water clear through the use of a filtration system," and "maintaining the pool itself through means of brushing, vacuuming and other methods." I will ask my peers for help with some suggestions and if that is not helpful I'll talk to one of the teachers.