The filtering method of the bottom filter is very simple. It can generate certain water flow in the water tank. The water flow will wash away the dirt, and finally suck it into the filter tank material through the water suction port. After being inhaled into the filter material, heterotrophic bacteria will decompose the feces, and the ammonia nitrogen produced will be converted into nitrate by nitrifying bacteria, so that it will not pollute the water quality, nor will it affect the health of fish.
1. Water change cycle: The water change cycle of the bottom filter fish tank generally depends on the situation of the fish culture. If the water quality is maintained well, it is not a problem if it is not changed for a month. However, because the water will evaporate, it is necessary to add water regularly. If the water is easily turbid, the interval between water changes should be shortened, usually 1-2 times a week.
2. How much water to change: The amount of water to change is generally related to the water change cycle. If it is changed once a week, the amount to change will be slightly larger, usually about one third. If you change it twice a week, you only need to change one fifth of it each time. In addition, if the cylinder is turned over, it needs to be replaced completely.
3. Note: If you want to change the water in the bottom filter fish tank, you can use its water outlet to pour out the water with a hose. You do not need to use other methods to get the water. After the old water comes out, it is injected into the new water, it should be noted that the new water can not be directly into the tank, must be filtered and then into the tank.
