[bigbr0ther]

Rachel is well meaning, but she doesn't really know that much about proper goldfish care. It's not her fault, of course; she's the only one who actually seems to care at all, and going into the house she didn't know she was going to be expected to look after fish. I blame the producers for not providing housemates accurate information about caring for them, and for not giving the fish a proper set up with a filter, a light, a heater, and plenty of space. The temperature for goldfish should ideally be in the high sixties.