Review on Seachem Equilibrium 300g: Optimal Balance for Aquarium Water by Denise Ward

This is an important tool for the aquarist. What most beginners don't even know is that after setting up an aquarium for the first time, every time they change the water they need to make sure to add the correct treated water, which is essential for aquatic life. This product is designed to add the right balance of minerals when using only reverse osmosis water. If you use tap water, you should use a product designed for tap water.