The main advantage of bottom filter is that it can reduce the accumulation of feces and food residues and help maintain the balance of water quality. This is good for raising turtles. In addition, the bottom filter can also create water flow and balance the water temperature, which is also helpful to keep the turtle healthy and comfortable.
However, the filtration effect of bottom filter is not as good as that of some advanced filtration systems, such as swamp filtration system. The bottom screen mainly filters solid pollutants insoluble in water, but it cannot filter out harmful substances soluble in water, such as nitrate and nitrite. The long-term accumulation of these harmful substances may have adverse effects on the health of turtles.
To sum up, if you want to keep the water clean and not change it for a long time, you'd better choose an advanced filtration system, such as a swamp filtration system. If you still want to use the bottom filter, you need to change the water regularly to clean the filter to keep the water clean. No matter which filter screen you choose, you need to check the water quality regularly to ensure the normal work of the filter screen to ensure the health and comfort of the turtle.