i know you can do it.
also be very careful of the following:
water temperature:
also you have to be very careful about the water temperature when you do the water change. make sure it's not super cold and that it's not hot either. it's important to have the water temperature almost, if not exactly the same, as the water temperature that they are swimming in.
if the temperature is way too cold or way too warm, the bettas will not be happy. and some can even die.
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how much to feed:
if you have pellet food, just give them 4-5 pellets per day at one time. usually they will eat it all up right then and there. but if you see some pellets or flakes hanging around the surface after about 10 minutes, get it out.
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water changes:
okay i hope you understood me and stang about the water changes. it will be very important to do them at least every other day fbtgirl!
i just want to make sure you know that you have to prepare the new water you are putting into the tank first before you put it in. you have to dechlorinate and condition it. if you are worried about the temperature of the water, just let it sit in a pitcher for about an hour so that it can get to room temperature which is what your tanks all should be about anyways. once the conditioned water is room temperature, you can pour it in the tank for your betta.
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okay, please let us know if you have any questions as we want you to have a successful babysitting experience.