Aquarium fishes are based on the feeding behavior and aggressiveness. Many varieties of fishes cannot be placed together. Sometimes fishes in aquarium fights with each other. It occurs due to injury mortality. Nature, feeding behavior, aggressiveness and many more flexible combinations of fishes are to be considering for aquarium.
How many fish you can keep in your Aquarium ?
Sometimes people confuse to place the number of fishes in aquariums and they very often ask the fish pet shops. One should place such number of fishes it should not over crows. To know this you can calculate the number of fish by using a simple formula.
Length of aquarium (cm) X breath of aquarium (cm)
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20
For example:
Length of aquarium (90cm /3 feet) X breath of aquarium (30cm / 1 feet)
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20
2700
= --------- = 135
20