Should I be worried about leaving my (2) tanks alone for 5 days?

One is a 20 gallon with (2) discus in it and the other is a 58 gallon that has been setup for 14 days. I plan on doing a water change the night before and the same day I come back. I plan on not feeding the fish. Will this be okay?

I cant see any problem with that at all. Just dose up EI before you go, Im sure the few days late wont make a huge difference on ferts. The fish will be fine on no food for 5 days, might even do them some good and allow them to clear out their systems.