Biological Cistern Blocks

A simple to use Toilet Cistern Block, just drop the individual tablet in the cistern, without removing the packaging - its soluble - and let the block go to work! Cistern Block improves toilet hygiene by using nature to form a bio-film on the surface of the toilet to prevent waste sticking, and staining from limescale. Make sure the block is positioned away from the water inlet. The water in the toilet contains enough surfactant to clean the bowl if necessary with just a brush, flush after cleaning. No need to use any other cleaning product. Enhances performance of Septic Tanks.