Hi, new to fish keeping literally only had fish for a week and I already have so much going on. In the tank I have 2 x Cory catfish, 8 x pacific blue-eyes (1-2cm fish), 6 x male guppies, 6 x female guppies, 6 x neon tetra, 1 x male gourami and 1 x snail. This is in a 100L tank. They all seem...