The tank had been running for about 3-4 months. It must only be trace amounts if the detection kits couldn't pick it up. the brass fittings were on the outlet of the pump, and two barb connectors for the return line tubing.
I am searching for some new poly filters right now, figure I would do a water change, get some cuprisorb and change the poly pad and continue with the ploy pads. The poly pads are my only true detection methods at this point. Pricey, but will be worth it in the long run.
Matttaylor_CHP? Good for you! My buddy was in it for awhile and loved it!