New fish tank

My daughter has been working at keeping her bedroom clean. now that it's been rearranged, she's having an easier time of it. So, the 5G tank we found at Goodwill has been cleaned and new fish "stuff" has been purchased. It's now running to establish the tank and possibly this weekend she'll get new residents for it. My son has a 10G tank that he has to figure out what he wants to do with before we can set it up.