5 gallon

Hey guys , i have a 5 gallon with some danio zebra, neon tetras and a couple of guppies. So my girl is staying at the bottom of the tank since last night and is breathing kind of heavily. Can you please help me!

So. This is the first and only forum besides a professional photography one I belonged to for almost a decade... I haven't found answers that helped me yet. One was about killifish egg hatching but that's kinda scary to me. I don't want to get fish just to have them while I learn... I love the...