Is it OK to have guppy fish and goldfish in the same tank?

Answer 1

No, they are not acceptable tankmates. Guppies are tropical fish and require higher temperatures than are likely to be comfortable for a goldfish. In addition, the goldfish will eventually grow large enough to swallow the guppies.

Answer 2

Yes guppies and goldfish live peacefully together. The goldfish will try to eat any guppy babies they encounter, but, once the baby guppies are big enough, no problems.

No it is not; guppies are very sensitive and cannot stand as much acid as the goldfish give off; a day or so after you put that guppy in the tank it will die so don't waste your money - buy another tank!

If the fish are the same size they will probably get along, but goldfish are more aggressive so watch carefully.

Goldfish don't "give off" acid. All fish eliminate waste and consume dissolve oxygen which can increase the acidity of water levels in a poorly filtrated or immature bio system. Goldfish produce significant amounts of waste, but are tolerant of the increased water chemistry. Other fish may not be. Guppies tend to be resilient to temperature changes, as are most Danio (zebra fish) varieties, but not necessarily the increased ammonia, nitrite, or Ph levels that build up.

Goldfish can for the most part live happily alongside tropical fish, but the reverse is not true. You have to set your tank up for the most sensitive fish you will keep... the most important considerations being providing a stable temperature and Ph.

Answer 3

You can, but it's not a good idea.

Guppies are tropical fish, doing best in temperatures in the mid-70's. They can survive for a while in cooler temperatures, but will usually get sick and die.

Goldfish are cold-water fish, preferring temperatures from 45-65. They can live in warmer water, but that can cause several problems, including disease and death.