Thanks Guys. This came to me from Jason (jgarrett830). He bought a box full of tank stuff off of craigslist and this was in it. He will probably tell you about it too but I think he did good. He got a custom (and beautifully) made sump, probably worth $250. There was an old but still working Neptune Aquacontroller 3, three little giant pumps, two heaters (the Jaeger he gave to me), seven or eight magnetic algae scrapers, three air pumps, a really cool dual chamber (what looks like to me) fluidized reactor,and much more....just gobs of stuff...all for $85.
I'll check out the link and see if I can find the conductivity sensor. Thanks again!