Restore Water Supply and Test System

What happens here

Once the cartridge is installed, slowly turn the water shut-off valve counter-clockwise to restore the water supply to the toilet tank. Allow the tank to refill completely. After it's full, flush the toilet. Observe the water in the toilet bowl; it should turn blue (or the color of your chosen cartridge). Crucially, check the water inside the toilet tank; it should remain clear, demonstrating that the cleaning agent is only dispensed into the bowl and not contaminating the tank water or damaging internal components.

Goal: Slowly turn the water supply back on to refill the tank, then flush the toilet to confirm the system is working by observing blue water in the bowl but not the tank.