I started a new tank a bout a month ago, i have 4 Giant Danios and 2 Glowlight Tetras.
I brought an extra 2 Glowlight Tetras and 2 Neon Tetras. I noticed that one of the Glowlight Tetras had a very fat belly. A week later and another Glowlight Tetra has a fat belly as well as the largest of the...