decided to clean my wavemakers as per monthly routine. calcium carbonate buildup in pumps not cool. thought about vinegar. naaah takes too long. i took all four boyu wavemakers and took apart. put in bucket and poured pool acid( hydrocloric acid) left it for a couple of minutes. rinsed them under fresh water for a while and dried off and returned to tank. i rinsed my hands and arms with bicarb powder to neutralise any splashes and i poured the acid down the drain.