what are the factors in ponds which enable the fish to live?
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There are several factors in ponds determining the safe and healthy life for the fish. The first is the adequacy of the water in the pond perennially. Second is the quality of the medium i.e., water, which should be at the level suitable for the continuing life of the fishes. Thirdly, the adequacy of food at any given time in the ponds. Fourthly, low level of predation by other fishes, birds and reptiles. The last one is necessary, though some proportion of fishes will disappear through predation. The nature thereby keeps the populations of different fishes balanced.
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Lack of oxygen in water of ponds enables the fish to live.
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