Either it's automated telling machine or more likely 'at the minite/moment'
I have a white balloon molly in mine. was in the tank when i bought it. (obviously in a container for transport etc. lol)
She is always there at the front of the tank when I come in the room.
She is the boss (mother) of the tank.
I will be sad when she goes but unfortunately balloons being such a hybrid fish only last for 1.5 to 2 years, and theyre not sold till theyre about 6 months so you dont have them that long.
Thats the price of interfering with nature i suppose.
I wouldnt worry too much if he/she does go, because they love their little lives, as you know seeing him /her race to you each time you come in the room. One of the happiest fish I've known even when diseased.
Hope yours gets better and don't give up.