When newly purchased fish are placed in a new aquarium, due to pH changes, the fish will become sluggish or swim wildly, as well as unbalanced swimming. The phenomenon is related to the stimulation of gills by pH value. Since pH is irritating to the fish's skin, the color of the fish can also be affected by changes in pH.

If the water is too alkaline and the fish is not adapted, the gill tissue of the fish will be burned, which will affect their normal life. Bleeding, swollen skin, producing a layer of clear mucus, suffocating to death for a long time), and susceptible to parasites.

If the acidity of the water is too strong, it will slow down the metabolism of the fish and affect the digestion of food, and often eat a lot but grow slowly. If the fish lives in the old acid water for a long time, the nervous system and respiratory system It will be damaged, so there will be tremors, leaning to one side, and spasms.

Generally speaking, it is difficult to maintain the alkalinity of the water in the aquarium, because the fish excrement and the spoilage of the remaining bait, as well as the negative hydrogen ions generated by decomposition, can make the water gradually sour and make the water more acidic. The metabolism of the fish is hindered, and the nitrate is produced along with it, which makes the fish poisoned. When it cannot be tolerated, it becomes poisoned and died.

Pay attention to changes in pH, and timely detect and control the pH of water, which is beneficial to the healthy feeding of tropical fish.