Does your res have any vortex problems as in continuously sucking air back into the pump and water?

Just curious if that sort of condition might create a higher than normal oxygen level stimulating the reaction.

I've been running straight distilled with PTnuke on the same fill for over a year now and don't see any oxidation on my DD MPC chipsets although I haven't taken apart my supreme yet. Regardless a little ketchup and a toothbrush will take care of that in no time...