A dirty aquarium, parasites, swim bladder and aggressive fish can all lead to a goldfish staying on the bottom of the tank. Most of these causes have easy fixes.
Goldfish tanks should be changed regularly. They are very messy fish that create high levels of ammonia. The ammonia can cause them to become sick and stay on the bottom. Goldfish can get fish lice and other bugs if they are not properly cared for. There are medications used to prevent or stop infestations. Swim bladder is another cause for bottom swimming or laying. If the fish does not have the proper diet, they become constipated which pushes on the swim bladder and messes with their buoyancy. Aggressive fish also cause goldfish to stay on the bottom and attempt to hide.Learn More
A number of issues cause goldfish to engage in bottom sitting, including poor water conditions, ammonia, nitrates, nitrites, parasites and swim bladder disorder. Bottom sitting is when a goldfish sits at the bottom of an aquarium.Full Answer >
A 10-gallon tank is unsuitable for keeping any adult goldfish. Goldfish commonly reach sizes of 8 to 10 inches, making them far too large for a 10-gallon tank. Fancy goldfish require at least a 20-gallon tank, and common goldfish need a 30-gallon tank.Full Answer >
Goldfish Connection indicates that goldfish sit at the bottom of an aquarium because of high or low levels of certain chemicals, such as ammonia or nitrates, in the water. A low pH level can also cause goldfish to settle on the bottom of the tank.Full Answer >
Goldfish sit at the bottom of a tank when they are not well, often because toxins have built up in the water. Goldfish are usually active, and lethargy is a sign of illness.Full Answer >