What Size Tank Do Goldfish Need? - Goldfish Tank Size Guide.
We have a 10 gallon tank with snails and 6 goldfish. I was told suckerfish will help keep the tank clean, so why have the last two sucker fish died within hours of adding to my goldfish tank? I was told suckerfish will help keep the tank clean, so why have the last two sucker fish died within hours of adding to my goldfish tank?
A 10-gallon aquarium will be a fine starter size tank for two to four small goldfish, but the goldfish will not reach their proper adult size unless they are placed in a larger aquarium. The rule of thumb is 1 gallon of water per inch of fish.
One goldfish needs a 30-gallon tank, and an additional ten-gallons per additional goldfish. Goldfish can grow to be 10-12-inches long.
Ten-gallon aquariums are too small for many fish. While a 2-inch-long goldfish may be fine in such a tank for a brief time, he will eventually reach 10 inches or more in length, making him entirely too large for such an aquarium. Nevertheless, several small fish species, including neons, cardinals and small tetras, may live long, healthy lives.
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I bought my fantail goldfish, Mo, in August, and I had him in a 10 gallon tank. After reading MAC postings, I realized the errors of my ways. I bought a 40 gallon aquarium, cycled it for 5 weeks and added live plants and an air bubbler. While waiting for the new tank to cycle, I was a partial water changing fiend with the 10 gallon tank.
The general rule of one gallon per one inch of fish and the specific goldfish breed should be used to gauge the size of the tank. Common goldfish usually grow the largest, around 12 inches and more, under right conditions. If you are getting a pair of those, then you will need a tank of at least 40 Gallons.