I wish I still had pictures of mine but they are long gone. about 15 years ago my stocking levels reached a frightening level in my main tank and I became convinced that a protien skimmer would help even though it was a FW tank and we all know that dosn't work... I modified a Skelter HOB unit with a 1/2" solid acrillic rod in the middle of the reaction chamber and drove it with a needle wheel powerhead rather than the weak venturi set up it came with.
The first week seemed to confirm what everyone said but by week two the reaction started and I was emptying the collection chamber once a week. Water quality and clairity improved a great deal and I ran the system for about two years until I returned to a saner stocking level. I shelved the unit for a while before giving it to a friend with an 80gal salt set up. As far as I know he still has it.