I have absolutely no idea where to place this thread, sorry if it needs to be rehomed. My bio wheel hasn't been spinning, I was wondering if adding vaseline to the section it spins on might help it spin? Maybe? But I didn't know if vaseline was approved as a safe product to use in an aquarium, do any of you know for sure if it's safe? On a side note, if vaseline isn't safe or doesn't work, can anybody think of any other ways to get my bio wheel spinning properly? I've cleaned the entire filter, including the impeller and for a week or so after I did the bio wheel was moving fine, now it's come back to a standstill. I tried cleaning the impeller again, but it hasn't helped.