In-tank toilet cleaning tablet

An in-tank toilet cleaning tablet placed in toilet tank
Blue toilet water from using in-tank toilet cleaner tablet

In-tank toilet cleaners (also known as toilet water tablets or drop-in toilet bowl cleaners) are tablets or cartridges that add chemicals to toilet tank water to reduce toilet bowl stains. They are commonly used to prevent toilet bowl stains from calcium, limescale, mold, etc.[1] Most contain chlorine bleach as its main active ingredient,[2] however some may use other main active ingredients.

  1. ^ "In-Tank Toilet Bowl Cleaners". do it yourself. Internet Brands, Inc. Retrieved 2 December 2017.
  2. ^ Klinkhammer, Michael. "Chlorinated in-tank toilet cleansing block". Google Patents. Retrieved 2 December 2017.