RezBlock keeps the resin in the water and not stuck on your water pipe. Just a few drops of this all-natural concentrate will prevent the resin build-up which makes your water pipe scody. It won't affect the taste and can be added with each water change. Made in the USA.
- After cleaning and refilling, add a few drops to the water.
- Fruit extracts, vegetable glycerin, purified water and citric acid.