Bloo's freshest ever in-cistern toilet cleaner blocks are packed with super cleaning agents that contain a unique 'Acticlean' ingredient, a concentrated cleaning action designed to prevent lime scale Releasing a thick foam with every flush, Bloo toilet cleaner blocks will keep the toilet sparkling clean for longer Bloo toilet cleaner blocks provide a great variety of ways to help keep your toilet clean Toilet bowl cleaner that comes in various colors and scents Bloo Twin Blocks In-Cistern Toilet Cleaner pack has 2 blocks and 1 free offer