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?
Ordinary chlorine bleach works very well for cleaning aquarium equipment. You do have to rinse off the residue, and it is a good idea to use a soak with Prime in it as the last rinse. The hard part of cleaning a Koralia powerhead is taking it apart and putting it back together. To me that is much harder than for normal powerheads, but essential if you really want to clean it.
Bleach is by far the most accepted way to kill bacteria and sterilize things. Vinegar is good for cleaning alkaline water deposits but it does very little for killing bacteria. Vinegar is made by letting bacteria ferment apple juice and still has lots of bacteria in it when we pour it out of the jug.
Any worries about the chlorine in bleach are not well thought out. Chlorine is a gas by nature and will blow away as things dry. The reason you smell chlorine nears pools or spas is because it is coming out of the water and blowing away.
I probably go for the bleach as much because it is always here as much as any other reason. My wife always uses the cheaper non-scented anyway so it just makes one less item for me to store as we share the jug.
But then I also still have a stock of jeans with holes from water treatment work. We used to go out and pour gallons and gallons of bleach into wellheads to clear bacteria and I got pretty sloppy with it.
Bleach on your clothes is a bad deal but it is pretty safe if you pay attention to a few details.