While
the basics of fish training are easy to do, and nearly all fish are
capable of learning, there are a few basic "qualifications" you should
consider before you begin. Think of this as the Fish School entrance
exam.
Most types of fish can learn at least some of the Fish School tricks.
Betta, Goldfish (common and fancy), Oscars and Parrot Cichlids have all
be trained using the techniques described in the Fish School Training
System.
But
just like people, some fish are better at certain subjects than others.
In other words, certain tricks are easier for some fish, and some
species of fish. For example, fetch training is easier for Oscars,
Parrotfish and other Cichlids that naturally like to pick up and carry
gravel. Other species, like Goldfish typically don't carry gravel
around, so may find this behavior more difficult to learn. Similarly,
bettas some fancy goldfish aren't very athletic, and so may have
trouble jumping out of the water or pushing a soccer ball! If you fish
is having trouble with a certain trick, try a different one.

Another important factor contributes to success Fish School is the
fish's size. A minimum fish size of about 2 inches seems to be a
necessary for fish to learn - smaller than that and they don't seem to
have the necessary brainpower.
Certain tricks, like swimming through the hoop, are easy for fish as
small as 1½ inches. Others, like soccer, require fish big
and strong
enough to push the ball along the bottom of the tank. This seems to
require fish at least 2 ½ to 3 inches long.
It is important for successful training to be able to reward the good
behavior of individual fish. This is difficult in a tank that has lots
of fish in it - since they will all compete for the food reward. This
does not pose too much of a problem in tanks with 1-3 fish, but can be
an issue in tanks with four or more fish. If your tank has lots of
fish, you might consider buying a small "training tank", or a tank
divider at your local pet store. This will provide a private classroom
in which your fish can learn.
Remember, only happy and healthy fish learn well. It is critical to
take good care of your fish. One important part of taking good care of
your fish is to have a tank that is big enough for both your fish, and
the fish school training equipment. We recommend a minimum tank size of
3 gallons, but 5-10 gallons or larger is even better.