Keep your toilet clean with Harpic Power Plus toilet cleaner tablets. Harpic power plus tablets start working immediately to thoroughly clean under the waterline, without any need to scrub. The tablets give a deep clean without scrubbing. They are effective in removing 100% limescale and works in the u-bend. The tablets come in a pack of eight. Dosage instructions: for regular cleaning, use one tablet per week. For best results, leave for six hours before flushing. For removal of heavy limescale build-up, use two tablets and leave overnight. Suitable for septic tanks. Usage instruction: Wear suitable gloves when removing the protective wrapper. Lift the toilets seat and carefully drop the tablet into your toilet bowl. Leave for at least 20 minutes with the toilet seat in the upright position and then flush.