u/isabella_tcy14

I have 3 goldfish, all won at a fair. The oldest fish is about a year old, the other two are new (got a day ago). I have a filter in the tank but my older fish keeps going up to the top and like eating the air? my dad says it's because he's just looking for food but I don't think so. Help💔💔

Edit: Since this post, I have added another filter and am getting a bubbler. This tank is a temporary home till I can get a bigger tank. If there's anything wrong with the tank, can you at least tell me what's wrong, rather then just saying it bad? Also if you have any other helpful information, that'd be great🥹