If you're just trying to aim where sinking pellets land, a long thin piece of PVC pipe will work fine, you can find them at hardware stores pretty cheap.
I came home from work today, and noticed a strange bump that wasn't there the previous night. (I had done a water change, and didn't see anything out of the ordinary at the time).
He hasn't been showing any odd behavior, and he was swimming merrily among the new plants I put in his tank to...