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The rule of thumb is 1 gallon per 1 inch of fish. But of course if you have bigger goldfish you will need more room. So for larger fish, go 1 gallon per 3 inches of fish.

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Q: How many goldfish for 30 gallon aquarium?
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How big of tank for 12 goldfish?

For twenty small (1-1.5 inch) Goldfish you should have something like a 30 gallon aquarium.


How do you set up a 3 gallon goldfish tank?

You cant. Goldfish need much bigger tanks. 20-30 gallons. I bought 2 goldfish when I was new to aquarium hobby and put them in a 5 Gallon tank. The first one died in just one and a half day. The other one died just hours after the first one :( So if I were you, I would get a bigger tank.


If your goldfish is about 2 and a half inches long how big does its tank need to be?

Regardless of the type or size of goldfish the minimum acceptable size of an aquarium for a goldfish is 30 gallons. Buy a tank that is at least 30 gallons if you plan to have goldfish. You can comfortably fit 3 goldfish in a tank this size but no goldfish in a tank any smaller. Goldfish are essentially pond fish and need lots of space to swim; they will not thrive in a small aquarium.


Should you get a 30 or 40 gallon aquarium?

Its all your choice, my friend. However, the bigger the aquarium, the better the ecosystem- so I'd go with the 40 gallon. I have a 40 gallon fishtank myself.


Can a 2 comet goldfish live ia a 5 gallon tank?

One goldfish needs a 30-gallon tank, and an additional ten-gallons per additional goldfish. Goldfish can grow to be 10-12-inches long.


How many goldfishes can you put in a two and a half gallon tank?

No, one goldfish needs 20 gallons alone at minimum, plus an additional 10 gallons for every goldfish you wish to add. This means that for two goldfish, you need at least a 30 gallon aquarium.


How many snails is to many in a 30 gallon tank holding 12 tropical fish and 1 goldfish?

7....But you should keep an good watch on them.


How many goldfish can i put in a small pond that holds 1000 gallon's?

Goldfish need plenty of room to swim around and get very large. In a 1000 gallon pond you could put 25-50 goldfish just keep in mind that goldfish grow very large and need about 20-30 gallons each when full grown.


What is the rule of thumb for stocking freshwater fish tanks?

The rule of thumb for stocking levels in a freshwater aquarium is 1 inch of fish per gallon of aquarium. For instance, five 1" guppies in a 5 gallon tank, or ten 3 inch cichlids in a 30 gallon aquarium.


Would a 30 gallon aquarium make a good sump?

A 30 gallon would be suitable if done properly for a tank up to about 125 gallons. Maybe 150.


How does a goldfish grow as a size of a foot when in seawater and still the same size when in a bowl?

Goldfish release growth-inhibiting hormones into the water they live in: the more goldfish in a smaller space, the less likely they are to grow. For instance, if I have a common goldfish in a 5 gallon tank, it will grow to about the same size if I had 6 of the same fish in a 30 gallon tank. But leave that fish alone in a 30 gallon tank, and it will grow larger. This is why pond goldfish grow bigger. But goldfish won't grow at all in seawater; they aren't saltwater fish.


Where can you get a 30 gallon fish tank?

At a Petsmart, Petco, aquarium builder, or a trusted pet shop