The most important thing to raise rainbow fish is water quality management, which requires a lot of thought. In any case, all aquarium lovers must try their best to remove nitrite and ammonia (ammonia) from the sink when raising fish.
The tolerance of rainbow fish is very low, so if the water contains these substances, _ fish can't live. Fish will cramp when put in inappropriate water, and the whole body will shrink to the center of the body and suddenly become like an egg-filled rice.
Most rainbow fish inhabit rivers in South America, such as Amazon or La Plata. There are many soft love the water fishes like Pearl Red in South America. The specific data are weak acidic water with pH 6.5-7.2 to neutral water, and the water temperature is preferably in the range of 24-27℃. Of course, this does not mean that keeping the data within this range will definitely raise live fish.