my small plastic bucket goldfish aquarium

aquarium whith small goldfish - YouTube
Photo provided by Flickr
When setting up an aquarium or pond for an oranda, going for a bottom without substrate is the best idea. These goldfish, especially the more extreme ones, may get small grains of sand in their wens when foraging. This can cause irritation and in bad cases even infection.
No matter which way you look at it, a small aquarium equates to much more work, frequent water changes, and stressed out goldfish.
Photo provided by Flickr
So, if you had three small goldfish with a total weight of 1 ounce in your 20-gallon aquarium with biological filtration, the fish load would be about 13 ounces per 260 gallons (260 gallons divided by 20 gallons equals 13 times 1 ounce of fish) — well below my recommendation. However, in a year or two, and with the right care, those fish could easily have grown to weigh 1¼ ounces or more each! Then the load would be more than 48 ounces (3¾ ounces times 13) per 260 gallons — well over the limit. But long before that, the fish would stop thriving. Interestingly, the article author’s recommendation works out to be between 17 and 35 ounces of goldfish (assuming mature specimens) per 260 gallons of water. There shouldn’t be any problem leaving them in the tank. Most aquarium vacuums are too small to suck up even a small goldfish.
Photo provided by FlickrIt cannot be put any more plainly than this: if you want to set up an aquarium smaller than 90 litres (20 gallons) in size, then goldfish are not an option.
Photo provided by FlickrFeb 18, 2015 - That's realistically the only fish that can survive long term in a 2.5 gallon aquarium. Your typical comet goldfish will need at least 30 gallons of water each to stay healthy long term. They're very messy fish and even in a small but suitable tank, owners often have major water quality issues.
Photo provided by Flickr
Keep your goldfish in a nosmaller than a 10 gallon (about 38 liter), and make sure that aminimum of 6 gallons (23 liters) of the space in that fish tank isdedicated to each goldfish (each goldfish should have 6-8 gallons ormore (roughly 23-30 liters or more) space in the goldfish aquarium). A10 gallon fish tank is really only suitable for one goldfish.There is an element of truth to this, but it is not as innocent as it sounds and is related more to water quality than tank size. When properly cared for, goldfish will not stop growing. Most fishes are in fact what are known as indeterminate growers. This means that, unlike humans, they grow until they die. What really stunts a fish’s growth is poor water quality and improper care. In smaller aquariums or bowls, water quality is typically very poor. With little or no filtration and infrequent water changes, goldfish suffer. The stunting that results is not a good thing. Rather, it is a sign of ill health, and, frequently, stunted fish take on a deformed appearance and die at a young age. As already stated, some goldfish grow very large, so it is important to know what size your fish will attain before purchase and to make sure you can provide it with the proper care it requires.People have long kept goldfish in small bowl-like containers, and while goldfish are hardy fish capable of surviving in a range of conditions, a bowl is really an ill-suited home for them—it lacks proper filtration, aeration, water volume for the dilution of waste, space to grow, and a home for ammonia- and nitrite-converting bacteria (for biofiltration). Large aquariums are a definite requirement for their long-term care and survival, as goldfish can grow quite large, depending on the breed. The common goldfish, so popular on fairgrounds, are among the largest, and they are capable of reaching over 18 inches and 10 pounds. Even the smallest breeds can reach between 4 and 7 inches, making them more suitable for a 20-gallon or larger aquarium than a bowl. Due to the goldfishes’ large size, proper filtration and water changes are a must. For larger goldfish, like the common or comet goldfish, an outdoor pond is really the best option unless you are willing to provide them with an aquarium in the range of 55 gallons or more, depending on the number of fish being kept.The most important thing to think about when keeping any fish is of course, water quality. Good water quality is only obtainable in the messy goldfish's aquarium if the tank is very large. The best tank size if one is thinking of keeping goldfish seriously, is between 50 and 60 gallons. With larger tanks there is more room for vigorous fish growth, and more room for mistakes. In a 60 gallon tank you can keep 3 fancy (egg-shaped) goldfish, or 2 common, or comet (slender-bodied) goldfish happily throughout their entire lives. Though you can keep more fish per tank, for the best end-results, its advisable to have 20-30 gallons per large fish. With smaller fish, you can get away with 10-20 gallons per fish.