I have a hydor koralia power head that was once in my aquarium and now I want to use it in my RO/DI water storage container. It has been out of the tank for over a week now. I was thinking about soaking it in a mixture of flourish excel/water over night to kill off the rest of the algae. Then rinse it with RO/DI water before I put it in my nice clean water storage container. Good idea?