Bromine and chlorine are both used to disinfect swimming pools and spas. Bromine remains more stable than chlorine at high water temperatures so it is commonly used in spas. Bromine is about as acidic as chlorine and is more expensive. Sometimes bromine for pools is sold in buckets of granules but it is usually sold as large tablets. Bromine breaks down quickly in sunlight but it is usually neutralized with a chemical named sodium thiosulfate. Sodium thiosulfate is kept in laboratories that work with bromine and it is the prescribed neutralizer for bromine spills. It also neutralizes chlorine.
Neutralize spilled bromine in laboratories and similar locations with a solution of sodium thiosulfate and water. Mop up the neutralized bromine with mops and sponges and repeat the entire process twice more.
Add one ounce of sodium thiosulfate crystals directly to your pool in front of your return line. Your pool's return line is usually at the shallow end of your pool and leads to your skimmer. This amount of sodium thiosulfate will neutralize one part per million of bromine in 10,000 gallons of water.
Repeat the sodium thiosulfate treatment of your swimming pool at intervals of 1 hour until you are satisfied with your bromine levels.
Add 1/2 teaspoon of sodium thiosulfate crystals directly to your spa with the circulation system running. Wait 1 hour before repeating the treatment as needed.