Question

Would there be bacteria present in the aquarium?

Answer 1

Hint: Aquarium is actually a small artificially created ecosystem. Bacteria are an integral part of any ecosystem. They are present everywhere like in lakes, ponds, rivers, etc. They might be useful or harmful.

Complete answer:
Since the aquarium is actually a small artificially created ecosystem, it has to have producers, consumers, and decomposers to maintain the balance. Just like the natural ecosystem, where we have bacteria as decomposers, they are required in the aquarium too. A healthy and clean aquarium depends on certain bacteria to maintain its balance.

The waste usually that accumulates in the tank is fish waste, dead plant material, and other organic debris. To break down this waste, bacteria are needed. Nitrosomonas and Nitrobacter are usually found in an aquarium. They keep the water clear and prevent toxic ammonia and nitrite from accumulating. These bacteria are present in the filter media and on solid surfaces in the aquarium, such as gravel, rocks, plants, and decorations.

Additional information:
The ecosystem is the whole biotic components plus its abiotic components. It is formed due to the interaction between all these components. They are interdependent on each other. There are two main types of ecosystem:
Natural ecosystem- These ecosystems operate under natural conditions without major interference or control by man. They may be terrestrial, like a forest, grassland, etc. or Aquatic as a pond, river, wetland, estuary, etc.
Artificial ecosystem- These are man- engineered and maintained artificially by man. There are planned manipulations. Example- cropland, aquarium.
The structure of the ecosystem includes the composition of the biological community, quantity, and distribution of non-living material such as soil, air, etc. and range of conditions of existence such as temperature, light, etc.

Note: Main thing is that we cannot keep the aquarium bacteria free. Bacteria are survivors, they adapt to most of the habitats. Thus, they are present almost everywhere.