golden arowana waterproof flooring

Burundi has recovered

  I just bought it in the early stage, and I was dying when it arrived.After recuperating and resting from oxygen and light, the state of rest was restored, and it is now comfortable and cute....

Anyway changing the water to clean and replace the filter cotton can not get rid of these white spot

Change the water anyway.Cleaning and replacing the filter cotton cant get rid of these white spot dust.Does any great god guide how this is caused?How do we do this?thank!   = (Comments...