Doh,
Forgot one of the key items. I'm running an ebay (from filterdirect) RO\DI water filter to fill my tank with. Some people can't stand em, but mine is currently sitting at ~1ppm DI water with 23-25ppm RO water so is performing quite nicely now that I've run over 100 gallons through it. All in all, quite a nice piece of gear so far.

Aaron