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Ideally, the water pump should push 10x the volume of the tank or pond plus an extra 100lph or gph. Goldfish will die without sufficient dissolved oxygen in the water. A filter that can do at least 10x filtration is best, which means that for every 10 gallons or liters of water, the filter should be able to cycle 100 gallons or liters per hour.
The watonai was developed both from the wakin and ryukin goldfish. Jikin goldfish - A fancy goldfish variety that has its double caudal fins splay outwards. Jikin goldfish have strictly two colors (red and white) and perfect individuals display a unique pattern called the '12 points of red'. It is like a wakin, but the caudal fins are spread apart.
Shubunkin (Japanese: 朱文金, Hepburn: Shubunkin, 'vermilion brocade') are a hardy, single-tailed goldfish with nacreous scales and a pattern known as calico. [1] They are of Japanese origin. [2] [3] The Shubunkin was created by Akiyama Yoshigoro (ja:秋山吉五郎) by crossing Calico telescope eye with a Comet goldfish and a Common goldfish.
Lionhead goldfish were bred to mimick the appearance of this mythological Asian animal. Lionheads were bred in China to depict the image of the mythical Chinese lion-dog (the shishi, in Japanese legend). [2] They were introduced to Japan from China during the 17th and 18th centuries.
The breeding and marketing of fancy goldfish with extreme mutations is sometimes seen as cruel practice by fish keepers and animal rights activists. Because the Pearlscale Goldfish has been bred to such a spherical shape, it may experience problems with its spine and internal organs, reducing its quality of life and longevity.
The variety is known for being a clumsy swimmer, so excessive water movement must be prohibited to avoid unnecessary stress on the fish. Many consider the Tosakin a delicate goldfish variety, but the breed has proven hardy enough to be kept outdoors all year long like other single- and double-tail varieties.
Goldfish are typically easy to care for, and black moors in particular are able to withstand a wide variety of temperatures. They do well with other fancy goldfish varieties, especially those with impaired vision such as the bubble eye or Celestial goldfish. In 1941, Moscow aquarist P. Andrianov bred a kind of black telescope with orange-red eyes.
Although calico coloration occurs in many fancy goldfish varieties such as telescope eyes, fantails, ryukins, orandas, and ranchu's, the nacreous scale characteristic is usually exclusive to the shubunkins, which are single-tailed fish that are similar to the common goldfish and could grow up to 12 inches in length. [2] [3] Calico Ryukin goldfish