Read Brian's post and you'll be glad you did. I asked a similar question before but after reading his post on my thread I accepted the fact that there's nothing I can do to prevent DE. And my aro is only 8" but starting to develop DE. Just keep it healthy and lots of TLC.
Its urban legends. If there were a cure thousands of silvers would be fixed. Your aro jumping alot is prolly just natural. Especially if your parameters are in check
The best way to cure it is a "For Sale" sign. Its luck of the draw, learn to love it... nothing at any fault of yours. On a side note I had really good luck keeping them alone untill they are about 6-8 inches.. but like I said is all luck of the draw.