it is a 28q. I think it is 17" wide and 26" long. It is one size down from the 41Q. She was about 1800g when I last weighed her so she is due for the larger tub soon, But I will have to do some major rearranging when I do to make more space for the larger tub.
Oh, Ok .. In that case I think its a gas bubble.. It will pass soon..