I have a large gravel vaccuum for my 44 gallon tank and it's growing mold inside the long, thin part of the tube. Is there any way to clean that out? Does it matter? Should I just buy a new one?
If you want to clean your siphon hose, just soak it for a while in a mild solution of Clorox and water. Then rinse it well and dry completely before using it again. If you want to be extra sure of removing all the bleach, just add some dechlorinator to the final rinse water.