DUX TOILET BOWL CLEANER POWDER is a white granular super-strength, acid producing bowl cleaner in powder form. DUX TOILET BOWL CLEANER POWDER is a powerful yet safe way of cleaning your toilet bowls and urinals. It’s powerful degreasing and cleaning formula is designed for the removal of heavy scaled build-ups and iron stains. It will effectively loosen and remove all stubborn stains caused by soils, lime scale and urinal salts found in toilet bowls and urinals. It is a highly effective product which cleans successfully and little effort. DUX TOILET BOWL CLEANER POWDER will not affect the operation of a septic tank system.