What fish are compatable with goldfish

Plecos should not be housed with goldfish. Plecos are from south america and need heaters, goldfish need cooler water temps because they need more dissolved oxygen. Colder water holds more dissolved oxygen then what warmer water does. Plecos need alot of green algae, aswell as supplementation with algae wafers, cucumbers, zuccini, romaine lettuce, shrimp pellets, broccoli, driftwood or bogwood for fiber and they develop a taste for the slimecoat on goldfish and will KILL goldfish. It has happened in the large indoor pond at the place i work at. Like goldfish, plecos excrete ALOT off ammonia.

Bettas, are tropical fish needing warmer water then what goldfish need. Bettas CANNOT handle the amount of ammonia goldfish excrete. Bettas are prone to fin rot and dropsy because of poor water quality. Bettas are carnivores and have different dietary needs then what goldfish do. Goldfish also get big enough to eat small fish such as female bettas.

Tri-color sharks are from the cyprinid family same with goldfish. They are a type of minnow. However, they need a heated tank and need to be in groups of 3-5 because they are a schooling fish. THey also grow to be 13 inches and need 70 gallons PER fish. They are skittish fish and it isnt uncommon for one to get startled and bust through a tank when it gets bigger.

Irridescent sharks GROW TO BE 4 FT LONG and are not suitable aquarium fish. They are a migrating catfish and need to be in groups also, they also will SWALLOW anything that they think they can. They too need heaters since they are warmwater tropicals.