harpic active power plus tablets are specially formulated to give your bathroom a thorough cleaning and careful. no need to scrub. they work immediately, the stains on the attack with a foaming action to remove 100% limestone and let your brilliant toilets to clean. fast and effortless to use, they clean under the waterline and in the trap, and are even compatible with septic tanks. drop a tablet active hunting simply toilet bowl of water and let stand at least 20 minutes (ideally 6 hours) before. for regular cleaning, use one tablet per week, or to remove limescale, use 2 heavy shelves and leave overnight. for the ultimate cleaning system, why not use active power plus power plus tablets with liquid, harpic toilet for the most powerful? available in original, citrus disinfectant varieties, powerful formula clings to the bowl to clean and freshen while removing 99.9% of bacteria and viruses, for true deep and hygienic and clean with a fresh scent.