I soak mine in white vinegar for a day, sometimes two if full of coralline. Them clean with a toothbrush under a running spigot . Just be sure they are rinsed out well before returning them to your tank.
Originally Posted by big http:///forum/post/3165528
I soak mine in white vinegar for a day, sometimes two if full of coralline. Them clean with a toothbrush under a running spigot . Just be sure they are rinsed out well before returning them to your tank.
+1, I used 50/50 mixture of white vinegar and water... Soak it for a day and then the coraline just comes right off. I just did 5 of my powerheads last week, they look new again.