FYI,
Like you I was trying to reuse a wet/dry filter for my new tank. I read all about bio balls not good etc. So this is how I attempted to solve my problem. I removed the tray and bio balls and ran the wet/dry in reverse order so I could place the skimmer in the water intake area. Although this worked, I still ended up getting a 20g tank during the Petco dollar a gallon sale and made my own sump with a larger skimmer. Because of limited funds I ended up getting the SCA-302 for about 130.00 including shipping and has been working great. Alot more skim and bubble compared to the seaclone.