If the pH value of the fish tank is as low as 5, you need to change the water frequently, or put a little coral sand into the filter, both of which can adjust the pH of the water body. After controlling the pH, it is necessary to investigate some of the reasons, to see if it is a water problem or a filter problem, if it is a water problem, need to change the source of water, or after treatment before fish. If it is the problem of filter material, clean or replace the filter material.
1, lantern fish: Lantern fish refers to small lantern fish, there are many types of them, such as black skirt, head and tail lights, lotus lights, traffic lights and so on. This kind of fish likes the weak acid soft water environment, usually the PH is about 6.8, the water temperature needs to control between 22-28 degrees Celsius.
2. Guppy: Guppy is also a common small ornamental fish. It has many strains and can adapt to a wide range of water quality. It can survive in weakly acidic or weakly alkaline water. Its pH can be between 6.5 and 7.5. The water temperature is generally around 22-28 ℃. It prefers soft water.
3. Rat fish: Betta fish are native to South America and are found in all Amazon River basins. Common species are white rats, golden moss rats, three rats, panda rats and so on, can accept weak acidic water quality, but more suitable for neutral water, it generally lives in the bottom of the water body.
