Testing your pool is a regular part of pool ownership. It’s essential to maintaining water that is crystal clear and algae free. It’s also important to maintain a good balance of chemicals in your pool because improper water chemistry can cause damage to your pool and equipment. Beyond that, imbalanced water can cause eye irritation and hair discoloration. Yikes. To get an accurate reading, you'll need a test kit, a test strip, or a water sample for a pool professional.