Harpic Toilet Block Fresh Power 6 Tropical Blossom Duo Pack offers 6 actions for clean toilets. Harpic Fresh Power 6 Tropical Blossom - 6 Actions for clean toilets. 1. Clean with every flush. 2. Dirt removal. 3. Anti limescale. 4. Last up to 4 weeks each block. 5. Pleasant fragrance. 6. Cleaning foam. Generates cleaning foam, has limescale action, has a pleasant fragrance, help dirt removal, helps cleans with every flush, lasts up to 4 weeks.