1, fish and water should be changed frequently. The purpose of changing water is to remove dirt (garbage, fish manure, residual feed and stale impurities), keep the water clean, adjust the water temperature and increase the oxygen in the water, thus stimulating the growth and development of goldfish.
2. Unpurified water
Refers to tap water or well water that has just been released and has not been dried. Its water temperature is often quite different from that of fish ponds (tanks), and it contains more chlorine. This kind of water is very harmful to goldfish, so it is best not to use it.
3, fresh water,
Dry water of tap water, well water and spring water is allowed to stand for about 2-3 days after drying, and the water temperature is the same as or similar to that of fish ponds (tanks).
4. Chen shui
It is dirty water with feces and dirt at the bottom of fish pond (tank), including feed water that has not been replaced for a long time in the pond (tank).
5. Old water
(1) is the general name of clear water in fish ponds (tanks), which is tender green, green, old green or brown green. Among them, light green water is the best.
(2) There are many green algae floating in the old water, which is also a good auxiliary feed for goldfish. This water decomposes less organic matter and more dissolved oxygen. It is often used to raise fish in tender green and clean old water. The fish raised have the largest appetite, strong body, bright color and rapid development.
Step 6 return to clear water
If it is found that the old green water in the original pool (tank) suddenly turns into clear water, and a lot of green algae are precipitated at the bottom of the pool, this phenomenon is called returning to clear water. This kind of water is easy to cause fish diseases and needs to be completely replaced.