do fish need space?
very important that the fish have enough space in the aquarium
to survive comfortably. Space is important for the fish in the
aquarium ecosystem for two reasons:
breathe oxygen that is dissolved in water;
need space in order to grow and to mate.
If there is too many fish and
not enough space, the fish will not have enough oxygen to breathe.
Over crowding will also cause the waste products to build up
and will make the water dirty.