The goldfish is a freshwater fish. It was one of the earliest fish to be kept in and aquarium, and it is one of the most commonly kept aquarium fish. Goldfish are hardy fish that can survive a wide range of water conditions. These little guys prefer cooler temperatures. They are not tropical fish. They can withstand temperatures that are close too freezing though we usually recommend a temperature a little warmer. They can survive a maximum temperature of 86 degrees Fahrenheit though. The biggest thing to be concerned about is that the temperature doesn’t change suddenly. The hotter the water gets the less oxygen there is in the water. Goldfish need oxygen to survive. Goldfish can grow to be very large so a large aquarium is recommended. They can eat a lot and will try to eat anything they can fit in their mouth. Goldfish food is formulated specifically for goldfish. Overfeeding can be very bad for your goldfish. Goldfish do not have stomachs so they do not know when they are full. You should feed you goldfish 2 or 3 times a day, but only small amounts. Their metabolism slows down if they are kept at warmer temperatures so even a small amount 2 to 3 times a day might be too much. Pisces Reef is here to help. Talk to one of our guys for more information.