Researching
livestock, before you make a purchase, is critical. You want to
know exactly what you're getting into as far as fish size,
requirements, preferences, potential problems, etc.
There is one site in particular, FishProfiles.com,
where you can choose the water type, size of your
freshwater aquarium, and go more
specific from there. Start
here and research your fish before you get them.
It is very
important not to overcrowd your tank.
The general rule is one inch of fish per gallon.
However,
that is far too many fish for a
healthy environment. This
is where common sense comes in.
Patience is key in fishkeeping.
Choose a few, see how they do, and add more later.