![]() The frequency of tank maintenance can impact the number of goldfish you can keep in a 20-gallon aquarium. These contribute to the cleanliness of your fish ecosystem, which contributes to the health of your fish. This means performing regular water changes and vacuuming the gravel to remove debris and waste. Frequency Of Tank MaintenanceĪ key part of keeping your fish happy is keeping their tank clean. As a result, we would still recommend sticking to 2 fish as the maximum number for a 20-gallon tank. However, it’s important to remember that goldfish are active fish that need a lot of space to swim. In theory, you could keep more than 2 goldfish of smaller varieties in a 20-gallon tank. This means that you might be able to keep 2 fantails in a 20-gal tank comfortably, but you would only be able to keep 1 comet. As a result, some goldfish varieties require more space than others.įor example, comet fish can grow up to 12 inches long, while a fantail goldfish maxes out at about 8 inches. As we mentioned earlier, goldfish come in various shapes and sizes. The first factor to consider is the type of goldfish you have. Now that we’ve answered how many goldfish can you keep in a 20-gallon tank, it’s time to discuss some of the factors that can impact this number. What Affects The Number Of Goldfish You Can Keep In A 20 Gallon Tank? As a result, it’s always best to err on the side of caution and give your active fish a little extra room to swim. By maxing out the number of fish in your tank, you are putting a lot of stress on your fish and the aquarium itself. Of course, this number is just a general guideline. Common goldfish can grow up to 10 inches in length, so 2 fish would be the maximum number you could keep in a 20-gallon tank. This number is based on the idea that you should allocate a gallon of water for every inch of fish you have. So, how many goldfish can you keep in a 20-gallon fish tank? We will get into the factors impacting this number later on, but you can generally keep up to 2 fish in a 20-gallon tank. If you want your goldfish to really thrive, you should consider getting a larger tank. However, it’s important to note that the 20-gallon tank size is only the minimum. As a result, they need a lot of space to swim and move around.įor these reasons, a 20-gallon fish tank is generally the minimum size tank that you should get for goldfish. Depending on the variety of goldfish, they can reach lengths from 6 inches to 2 feet. One of the most important things to remember about goldfish is that they can grow quite large. Goldfish are somewhat messy fish that produce lots of waste and require a lot of care and attention. However, this couldn’t be further from the truth. Goldfish are often considered “low-maintenance” beginner fish that can be kept in small bowls or aquariums. What Affects The Number Of Goldfish You Can Keep In A 20 Gallon Tank?.
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