Update

I neglected to post the results of last weekends water test, so here they are:

Salinity: NA (did not test)
Nitrate: 0 :)
kH: 9
Calcium: 450
pH: 8.3

I also cleaned the powerheads in a vinegar solution so they are running very well. Next time i do this i think i will make a page documenting the process. I will be going out of town for a week so i will have a friend stop by to feed and add buffers twice (in the one week i will be gone). I know from experience that when i leave my water quality goes with me. So i will prepare a large batch of water so i can do a water change when I get back.