The fish is sick, and it is the washing tank that completely eliminates the trouble
Or fish out and buy fish and put it in
100% of people will choose to wash the tank for water!
But when people are sick, no one solves the toxins in the body that cause the disease, but spends a huge amount of money to continue to increase the toxins to the body. Washing the tank and changing the water is to give the fish a good living environment, and people !!!