Why is my 2 gold fish consantly going up for air?
My sister and I just got a gold fish each for vanentines day and we each got them in a really small bowl but soon i well buy a tank with a pump. I change the water every other day and i put water from water bottles so i wont put tap water. And we feed them twice a day ( before then after school).My sis had to leave for a couple of days so im taking care of gilbert (her goldfish) But when i woke up this morning i noticed that both of them will contantly go to the top of the surface for air and come back to the bottom for not even for a minute and go up for air again. I really dont want our fishes to die and i hope my gilbert dosent die while my sis is gone cuz im pretty sure ill be the blame for his death. So pls pls pls help me what do i need to do????