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The substrate can vary from sand to gravel, but many aquarists choose crushed coral or aragonite sand, both of which help raise the hardness and pH to an acceptable level. Many brackish water fish, as any fish, can jump out of the tank, so it must be covered. Some brackish water species come from estuaries.
A pH controller is recommended to control the CO2. It works by connecting to the CO2 regulator on the CO2 tank and measuring the pH of the solution inside the reactor via a pH probe. The controller will turn on and off the flow of CO2 based on the pH inside the reactor. The pH range for the typical calcium reactor is 6.5–6.8.
Giant Danios are a tropical fish species and require a tanks water temperature to be at least 70 - 80 degrees F. Their lifespan is on average 5-7 years in captivity, and the ideal pH level is anywhere from 6.0 to 8.0.
In a home setting, these fish need well-oxygenated water with a pH level of 6.8 – 7.2, optimal temperatures varying between 72 and 82 °F (22–28 °C), and plenty of aquatic plants to give them hiding places amid their school. If properly cared for, Rainbowfish can live up to 5 years in captivity. [5]
However, for maintenance purposes the pH of the aquarium water can range from 5.6 to 7.4. However, if captive reproduction is to be attempted, the rummy-nose tetra needs soft, acidic water. A planted aquarium is welcomed by these fishes, particularly if the plants include fine-leaved species such as Cabomba and Myriophyllum.
The recommended temperature range is between 23–29 °C (73–84 °F). Ideally their tank should contain live plants, a darker substrate, and open water for swimming. Ember tetras should be kept in groups of at least 6, though recommended number is 9–10, in order to promote schooling. They appreciate a heavily planted aquarium, ideally with ...