ARKSEN Automatic Pool Cleaner Vacuum Inground/Above Ground + 5 Way Tester Bonus Setup; Pool Cleaner with 5-Way Tester Kit Tests pool and spa water for Chlorine, Bromine, pH, acid demand, total alkalinity Pool Cleaner has the power to clean your pool efficiently and at very little cost to you There are no wheels to jam, no gears to break and no diaphragms to replace Vacuum pools regardless of size, shape, or construction | Attaches to your existing filtration system