Goldfish ( زبان اصلی ) - وبلاگ تخصصی حیوانات

First, goldfish tend to thrive at sub-tropical temperatures, which
means about 68 to 72 degrees Fahrenheit. This is not to say that
75-degree water will kill the goldfish. It"s just that the lower
temperatures are healthier for them. Cooler water holds more oxygen,
which larger goldfish require for good health.

Second, goldfish
tend to be much more massive than tropical fish. As they grow, they can
easily eat more than the tropicals. The latter may end up suffering
from malnutrition. At the same time, goldfish also produce far more
waste products than the typical tropical fish. Some tropical species
require very clean water and goldfish will make this rather difficult
to maintain.

Third, temperate water fish
(such as goldfish) and tropicals tend to carry different diseases and
parasites and tend to be resistant to their specific diseases and
parasites. Thus, the mixing of the two can expose each to health
problems they are not at all capable of coping with.

The
fact is that many species of fish often seem to get along well when
they are young. As they mature, however, trouble can start. You might
not notice problems immediately because aggressive or predatory
behavior may occur at night. For example, your Chinese algae eater
becomes both large and aggressive as it grows and could eventually
spell serious trouble for your goldfish. Your first clue might be a
dead fish, or two.