There are essentially 4 types of Cold water fish commonly found in aquariums. There are listed below together with their tips of care.
Gold Fish
Tips 1: Ideal temperature 18-24 °C (64-75 °F)
Tips 2: 60 Gallons tank for 3 fancy goldfish or 2 common or 2 comet goldfish. 2.5cm (1 in) of fish per 60 sq cm (9.3 sq in) of tank water surface area is the bare minimum. Remember we must base the calculations on the adult size of the fish.
Tips 3: A full-sized canister or hang-on filter
Tips 4: Use Air stone
Tips 5: Weekly water changes of 30-50%
Tips 6: No dangerous items in aquarium (decorations or rocks)
Tips 7: No Plecosotomus
The goldfish is the most common type of Coldwater species kept. It can live in an unheated aquarium. As they are of the carp family, goldfish produce a large amount of waste both in their feces and through their gills, releasing harmful chemicals into the water. This is because goldfish like other cyprinids, is without a stomach and only have an intestinal tract, and thus cannot digest an excess of proteins. Build-up of this waste to toxic levels can occur in a relatively short period of time, which is often the cause of a fish’s sudden death. Temperatures under about 10 °C (50 °F) are dangerous to goldfish. Conversely, temperatures over 25 °C (77 °F) can be extremely damaging for goldfish. Their tanks need extensive filtration. The best style of filter for a goldfish tank is a full-sized canister or hang-on filter Aeration is very important since goldfish have very high oxygen requirements, thus air stone or other means should be used. Regular water changes are necessary for a healthy aquarium. Most goldfish tanks require a weekly water change of about 30 – 50% to keep the aquarium in proper working order. Large, smooth gravel is most preferred since goldfish will sift through the gravel all day long and you don’t want them to swallow rocks or cutting their mouths. Live plants aren’t usually kept with goldfish because they absolutely love to munch on them. Delicate goldfish such as Bubble-Eyes or Telescope-Eyes should not be kept in an aquarium with sharp rocks. There shouldn’t be any decorations with holes or caves smaller than the goldfish can swim through without scraping their sides and/or stomachs. Never keep Plecostomus with gold fish, as they love for the thick slime coating on a goldfish’s body. Many goldfish dies from the Pleco’s assault.
White cloud
Tips 1: Ideal Temperature 18-24 °C (64-75 °F)
Tips 2: 2 feet tank for 20 white clouds (maximum of 35).
Tips 3: Keep in a group of more than 6.
Tips 4: 20% weekly water changes
The White clouds stays small (4cm) is ideal to keep in smaller aquariums. They have a wide temperature tolerance and can survive water temperatures as low as 5°C (41°F). But the ideal water temperature will be 18-24 °C (64-75 °F). They need a well planted tank with open space to swim. They are schooling fish and should be kept in groups of 6 or more. They are very peaceful and can be housed with other type of community fish (Dianos) that shares the same water condition. Good filtration with gentle current is needed for them to stay happy.
