Fishes and many other aquatic species live in river water. When they are kept in aquarium, we need to change the water very ofte

(i) Respiration of fishes in water.
(ii) Components required for the survival of fishes and aquatic species.
(iii) Copmarison fo these amounts in river water and aquarium.

Fishes and many other aquatic species live in river water. When they are kept in aquarium, we need to change the water very often. Give reasons.

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