Here's the deal:
Next week I'm leaving the state to visit some family over spring break. My mom has agreed to watch Henry, but refuses to do water changes (which is for the better; she'd probably end up killing him if she tried, even if I show her how to do it properly).
So, I'll be doing a mega water change on Saturday night (I leave Sunday morning), and then another one when I get back the following Saturday.
His 2.5 gal tank will hopefully be filtered (after his fins frayed and tore I turned off the filter because it was just making things worse, but his fins are doing a lot better so I'm trying the filter again and seeing how things go), and it is heated.
When I have the filter plugged in, the water level drops a little bit each day. My question is:
When the water level gets too low (about a centimeter lower than I normally have it) can I instruct my mom to just top it off with room temp bottled water? It would be too difficult to measure out water conditioner for such a small amount of tap water, and bottled water doesn't have any hard metals in it. Also, his tank is kept between 79*-81*, and I don't really think a small amount of room temp water would alter it too much, would it? If it was just a few fractions of a degree, it shouldn't be so bad. He's handled more drastic temp changes before (oh the joys of being an inexperienced, first-time fishie mommy trying to figure out how things work) with virtually no issues; he's a tough little boy.
Also, if his filter starts causing issues again, would he be fine for a week without it? Of course I'd have my mom feed him a bit less than normal so he produces less waste.
Thank you =]
Edit: Oh yeah. And she'd only need to top it off 2 times max.