How can we keep the water in the tank clean for a long time?
Usually the only mechanical filtration to remove solid dirt, and soluble in water, there are a lot, such as organic matter such as protein is not filtered, completed only by biological filtration system to.
Modern ornamental fish tanks should be mechanically filtered and biologically filtered, and sometimes require physical filtration. Among them, biological filtration is of particular importance.
Water in fish tanks is contaminated by fish droppings, food scraps, and rotting leaves of water plants. In people's imagination, the visible suspension of water is filtered out to keep the water clear and transparent, but it is only the primary function of filtration, which we usually call mechanical filtration
the most important thing is to have a functioning ecological filtration system that includes mechanical filtration and biofiltration.
