tropical fish only feel safe when possible reproduction. This has two implications: First, are often frightened of tropical fish endocrine disorders, severe inhibition of gonadal development; biological nature of the parents to protect future generations, all living things instinctively choose an environment conducive to future generations for breeding, safety is a fundamental premise.

Polyculture model aquarium difficult to have a good breeding results are too serious disruption. If they can provide certain security conditions, such as available water the grass and stones hidden, some species are still breeding phenomenon, but very complex ecological relationships in the polyculture conditions examples of successful breeding of rare . One pair Tsz carving their own offspring will live to see during the day firmly, but at night, the eggs and larvae may be nocturnal fish dinner. Recommend that all information in the breeding of broodstock points raised, this is justified, even if the cluster nature of carps and fat carp species is also true. This is because the aquarium does not have enough space for water safety hatching of the eggs taken to a secluded place, and the food in the aquarium too lack the density of fish too big.

Breeding broodstock living natural conditions close imitation of the ecological environment, but also to ensure the tropical fish a sense of security. Each fish has a water quality and underwater terrain conditions they are familiar with, such as East Africa Mercy Corps carved only in the sandy bottom of the hard water before estrus, and the angelfish estrus must be clear of the water softener, most of the fish lamps like the dark environment of the multi-grass fish eggs and larvae only in the specific water quality and light conditions to hatch and survival. Broodstock must be found to give future generations an environment of safe living conditions, otherwise the breeding does not make sense. In many cases, some fish are difficult to breed in the aquarium, perhaps because we can not know exactly how the environmental conditions in order to allow the broodstock have a sense of security.