EASY LU-GREEN IN-CISTERN BLOCKSHOUSEHOLD TOILETRIES LU GREEN Weight: EASY LU GREEN IN CISTERN BLOCKS is made to help you with regular hygienic and efficient cleaning purposes for a toilet. Each block is created to release a dose of green foamy detergent with every flush into the toilet bowl and ensure spotless cleaning. Lu Green toilet block detergent colors clean and freshen the toilet bowls with every flush! Lu Green is great for use in every toilet as it colors the water green