WOULD THERE BE ANY BACTERIA IN AN AQUARIUM?
A balanced
aquarium
contains certain animals as
well as some plants. How
many kinds of animals can
you make out in the
aquarium shown here ? Name
any two such animals.
.

.
Do you think there would be
some bacteria in it? If so, in
which part of the aquarium
would they be occurring in
abundance and what for?
.

yes, many different kinds

Explanation: bacteria are everywhere and so will be found in aquaria. Aquarium health is dependent on bacteria. Fish excrete ammonia which is toxic. Bacteria such as Nitrosomonas and Nitrococcus convert ammonia to nitrite, and Nitrobacter converts nitrite to nitrate which is relatively harmless. Bacteria such as Pseudomonas stutzeri and Bacillus subtilis remove nitrate and organic waste. There are also bacteria in fish intestines, and other bacteria that can cause fish diseases or create undesirable conditions such as Pseudomonas fluorescens, Vibrio, Flexibacter or Aeromonas and anaerobes that reduce sulphates to hydrogen sulphide.

frogs. the lower the ph the higher the acid content. frogs have the highest tolerance in this scenario.