They are sold as dissolvable toilet-cleaning tablets (pods) and are also listed in a "liquid gel" product form in the provided details.
They are described as removing or helping prevent tough stains, hard-water mineral deposits and limescale, and they also deodorize and brighten the bowl as they clean.
The details state the tablets sanitize the toilet water in about 5 minutes and continue sanitizing for a multi-week period (for example, a 6-week duration is noted for one product).
Descriptions mention a continuous blue color in the tank water as an indicator. Reviews also note the tablets can leave blue water or a film that makes the bowl appear clean.
One product description notes effectiveness for up to 10 flushes per day and suggests the tablets are intended for toilets that are flushed daily. Overall lifetime will vary with flush frequency and product formulation.
