TRI-BIO ECO TOILET BOWL CLEANER "TRIPLE ACTION" CLEANS – WHITENS – SANITIZES AS EFFECTIVE AS THE BEST FAMOUS HARSH CHEMICAL CHLORINE AND ACID AGENTS. Quickly removes scum and limescale, leaving your toilet sparkling clean. Free of chlorine and harsh solvents, but as effective as best famous harsh chemical agents are. Absolutely safe for all types of surfaces. Based on plant-based, biodegradable ingredients.