My roommates surprised me with some fish they bought for my 10 gallon tank.
Now my 10 gallon tank has:
3 Albino Cory Catfish
6 Neon Tetras
Is this too many fish for my 10 gallon?
Should I tell my roommates to return the fish? =(
If I end up keeping everything, how much water and how often should I change the tank?
My tank setup is a 10-20gallon penguin filter, 10-20 gallon heater, and gravel.