Nave, how many fish are in your unestablished 55g? Around 12 small ones or so?
I'd do a huge water change just before you leave for your 10 day trip and I wouldn't feed them the whole time you're gone. I've read that fish can go 2 weeks or so without food.. and if you can't check water parameters or do water changes, this would be the way to go (no food).
If your GF will be there to feed other critters, show her how to dose the tank with Prime to detoxify any ammonia or nitrites that might be in there. All she's got to do is dump in some Prime. Read the bottle for the relatively high dosage amount required for this. Is she can't do that, it's time for new GF my man. (kidding!)
I'd do a huge water change just before you leave for your 10 day trip and I wouldn't feed them the whole time you're gone. I've read that fish can go 2 weeks or so without food.. and if you can't check water parameters or do water changes, this would be the way to go (no food).
If your GF will be there to feed other critters, show her how to dose the tank with Prime to detoxify any ammonia or nitrites that might be in there. All she's got to do is dump in some Prime. Read the bottle for the relatively high dosage amount required for this. Is she can't do that, it's time for new GF my man. (kidding!)