Goldfish are generally easy to care for, but many people kill goldfish because they are misinformed. In this article we will go over the basics on how to care for goldfish properly.

Slim bodied goldfish and egg shaped goldfish have different care requirements. For example, common and comet goldfish are slim bodied goldfish and orandas, ryukins, lionheads and ranchus are egg shaped body goldfish. There are more slim bodied and egg shaped breeds than I just listed, but that was just an example.

It is generally not encouraged that you keep slim bodied and egg shaped breeds together. The slim bodied goldfish are faster and they can prevent the egg shaped goldfish from getting food. They also have different minimum tank sizes. Slim bodied generally get larger than egg shaped goldfish and they swim faster, so they require a larger tank.

Many people assume that they can just get a goldfish and throw it in a small bowl with no filter . That is a myth. Goldfish are an extremely messy fish, so they require fairly large tanks. For 2 full grown egg bodied goldfish, a 40 gallon breeder tank would be minimum and for a full grown slim bodied goldfish such as a common or comet goldfish, a 55-75 gallon tank would be minimum to keep them permanently, but slim bodied goldfish are really better off in ponds. Goldfish also require good filtration.

For a 40 gallon breeder with 2 egg bodied goldfish, I would typically go with an AquaClear 70 filter. For a larger tank with slim bodied goldfish, a canister filter would generally be the best option. Inadequate filtration causes several problems. It can cause ammonia burns. Goldfish are messy fish and they produce a lot of ammonia and that ammonia will build up in the tank and burn the fish. Inadequate filtration in combination with too small of a tank causes stunting. Stunting is when the fish isn't done growing, but its scales stop growing because of the small tank and or poor water quality, but the internal organs of the fish keep growing because they aren't done growing.

Like any other fish, goldfish need water changes. Generally, you should be doing partial water changes every week. I do 50 percent water changes, but you can do smaller or larger water changes depending on the stocking and filtration of the tank.

Hopefully this article cleared provided some useful information. If you have any questions, feel free to ask.