If you’re looking to clean fiberglass pool walls, there are a few things you’ll need. First, a bucket. Second, a vacuum cleaner with the hose attachment. Third, a cleaning cloth or sponge. Fourth, water. Fifth, a detergent. Sixth, an air compressor and the appropriate tools for your job (a brush and scraper). Seventh, some bleach (or other disinfectant). Eighth, an air filter to keep the pool clean and free of particles. Ninth, a sealant (such as Gorilla Glass) to protect against water infiltration and corrosion over time.