This ez2mix Bathroom & Bowl Cleaner is great for "descaling" water fixtures that have built-up lime and rust. It is a non-corrosive cleaner that is safe for all bathroom surfaces. Easily cleans and removes calcium, magnesium, rust and other hard water deposits. Safe on metal fixtures, sinks, faucets, toilet bowls, urinals, floors and grout. You have to hook it up directly to our ez2mix handheld dilution control system for precisely measured chemical dilution. This helps keep cost down by properly mixing the chemical for the job. Simply hook the trigger grip dispenser up to a water source with the ez2mix 6-foot Filling Hose and automatically dispense the right dilution into your buckets or other containers.