I just moved and the people before me put one of those discs in the toilet tank that turns the water blue and I hate it. I removed the disc and also scooped up as much of the disc as I could. I have flushed the toilet hundreds of times. I just want the toilet water to be clear, not blue like a public restroom! Whatever brand this blue disc was, it sure works!

The blue's hiding up in the tank. Turn the water off at the stopl ocated under the tank and drain the tank. Pour some bleach in the tank and scrub it down. Flush the blue out of the tank and let it fill. Water look better now? Good luck, Tpm