Citric acid is a very good choice for removing fish tank scale, but attention should also be paid to the use method, otherwise it may bring side effects. First of all, before removing scale, it is necessary to fish out the fish in the tank, so as to avoid the fluctuation of water quality and the death of the fish after acidic substances enter the fish tank. Secondly, citric acid cannot be directly poured into the fish tank, but is generally smeared on the cloth to wipe it. In addition, wash several times after treatment to avoid acid residue.

1. Toothpaste: Toothpaste is generally used to remove scale. The method of removing scale from toothpaste is also very simple, smear it on cloth, and then wipe the location of scale. This method is very simple and convenient, but fish should be fished out before cleaning, and water should be released at the same time. Only when cleaning is finished can water be injected again to raise fish.

2. Fish farming: Fish farming can also remove scale. Some smaller tropical fish will eat scale, such as guppy. Don't worry that scale will be harmful to their health. Its components are generally calcium and magnesium, which are not toxic. However, with adequate daily feeding, fish rarely eat scale, and only eat it when they are hungry.

3. Soft water: The best way to remove scale is soft water. Scale is caused by impurities in water near the cylinder wall. If impurities are absorbed, there will be no scale naturally. The method of absorbing impurities is soft water resin, which can reduce the hardness of water and prevent the formation of scale.