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For proper goldfish bowl maintenance, goldfish owners must change the water out almost daily due to the large amount of waste and ammonia goldfish produce. Though it is possible to maintain a fish bowl if a tank is not a... More »

www.reference.com Pets & Animals Pets Aquatic Pets

Goldfish may leap out of their tanks if the water is too warm, or if it is not at a proper acidic level. Irritants building up in a tank that has not been cleaned recently, external parasites, and lack of oxygen in the w... More »

www.reference.com Pets & Animals Pets Aquatic Pets

Poor water conditions resulting in high ammonia, nitrates or nitrites are the most common causes of a goldfish staying on the bottom of the tank. Such issues must be addressed immediately to avoid permanent damage or dea... More »

www.reference.com Pets & Animals Marine Life Fish
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According to Old Orchard Aquarium, a goldfish bowl should be cleaned at least twice a week if the tank does not have a filter. A tank with a filter should be cleaned at least once a week. More »

www.reference.com Pets & Animals Pets Aquatic Pets

To care for a goldfish, house the fish in an appropriately sized tank filled with well-maintained and well-filtered water. Feed the pet a goldfish-formulated diet two to three times daily. More »

www.reference.com Pets & Animals Pets Aquatic Pets

Bacteria, algae, poor aeration, chemical imbalance and waste are several causes of cloudy water in a goldfish tank. Goldfish are messy and it doesn't take long for the water in an unfiltered bowl or tank to become cloudy... More »

www.reference.com Pets & Animals Pets Aquatic Pets

The most common cause of black spots on goldfish are trauma and irritation due to high ammonia levels in the water. High ammonia actually burns the scales, resulting in white patches. The black spots appear as the scales... More »

www.reference.com Pets & Animals Pets Aquatic Pets