Goldfish Tank Mates
The Social Goldfish Community

By nature, goldfish are social creatures and prefer to live with other goldfish. A group of goldfish is called a troubling but that doesn’t mean your goldfish will have any troubling with their tank mates; given they are other goldfish breeds. If all your goldfish’s tank mates are some- what similar in size goldfish, you don’t have to worry about any problems with socializing amongst tank mates (A large goldfish can eat a small goldfish given the opportunity). In addition, keeping all your tank mates goldfish will make it easier to care for them in terms of water quality, temperature, filtration, aquatic plants, feeding and so on. (see Goldfish Bowl for info on basic care of your aquarium)
Always remember how many gallons each fully grown goldfish will need before stocking your goldfish aquarium or goldfish pond (10-15 gallons/goldfish). If you stock too many, be prepared to upgrade your tank later on or watch your goldfish become unhappy and unhealthy.
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Usually goldfish only do well with goldfish of their own similar breeds. If the goldfish in question is a common goldfish and the guppy is a fancy guppy with a long flowing tail, the guppy could be at risk of having it’s tail fins destroyed. If the goldfish are the fancy ones, the guppies stand a chance. The real problem is that most fancy guppies like warmer water and goldfish like cold water. There are some guppies that can handle those temps. Ask the fish expert at the pet store which ones could live in cool water.
can goldfishes survive with guppies?