This is a pool shock alternative to chlorine and bromine. It's able to remove unwanted organic compounds from spa water, making it clean and clear in the process. The container is comes in is designed to be easy to pour, and the lid on top helps to prevent any unwanted spills. Just 1 ounce of this chemical cleaner is able to sanitize 300 gallons of spa water. It can also work in combination with a chlorine or bromine sanitizing system.Because this cleaner doesn't use chlorine, it won't have that strong chlorine odor. It's also able to stay effective over a wider range of pH levels than traditional chlorine.For best results, apply directly to the water while the pump is running. The granular potassium peroxymonosulfate dissolves easily into your spa or hot tub water.The lid screws on securely to prevent any unwanted spills.