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Tank Size for Goldfish

goldfish tankThe size of your goldfish tank will depend on area availability and the number of fish that you intend to keep. Goldfish is one of the aquarium fish species that requires large tank size for it to grow well and stays healthy. Main reason for needing large volume of water is because more water will mean heavy waste generated from your goldfish especially ammonia will be diluted to lower concentration and thus less likely to cause any harm. This will also help to prevent spread of aquarium fish disease especially dropsy and swim bladder or flipover condition.

A general rule of thumb before you buy your goldfish tank is to first determine number of fish that you intend to keep in your aquarium. A normal practice based on my own experience is that you will need,

3 gallons of water for every inch (2.5cm) of goldfish length

That means, if you have 4 goldfish with each measuring 3 inches in length, you would require at least 36 gallon fish tank size to accommodate all your pets. However, bear in mind that common goldfish can grow up to 8-10 inches in length and thus your aquarium should be sized accordingly to cater for your pet’s maximum growth. Common mistake made by aquarium owners is to buy smaller tanks when they think that this is more than enough for the younger fry but later found out that, the fish tank size is in fact not big enough after all.

Having the right aquarium size is very important because without much room, this will mean that your goldfish will not be able to reach maximum growth size and will become stunted. This will also lead to development of not proportionately equal fin size.

Related topic: Goldfish Reproduction

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About Me

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My fascination and interest towards aquarium fish has led me to devote my time towards caring and learning about this wonderful pet.

Aquarium fish keeping is a very challenging and exciting hobby. When I first started, I never knew much or have the necessary guidance back then because none of my family members were actually a keen hobbyist. And because of that, I’ve encountered numerous failures and the worst part is having to deal with dead fish every time when you started to grow fond and getting attached to my pets. However, I persevered and took steps to find out and search for information from other hobbyist, apart from the knowledge gained and learned from my own experience and research. The blog that I’ve created here is meant to share useful information and tips about aquarium fish keeping so that new hobbyist will not make the same mistakes that I’ve made in the past."

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