Bloo Power Active Toilet Rim Block offers a simple clip-on design that is safe for septic tanks. Its strong foaming action tackles stains and grime, while releasing a fresh floral scent with every flush. Enjoy 4-in-1 cleaning power that prevents limescale, cleans with foam, protects against dirt, and delivers extra freshness. Each block is long-lasting, providing continuous cleanliness for up to 240 flushes.