How often to change the fish tank filter media is very important in the process of raising fish, so how often to change the fish tank filter media. The first thing you need to know is that there are filtering cotton, rattan cotton, bacteria house, activated carbon and so on. It is better to replace the filter cotton and filter magic carpet every 7 days, so that the filtering effect can be better when using, but you can also rinse it and use it again, but it is better not to use it for more than one month. And like bacteria house, breathing ring, biological ring and other appliances are generally not aging, but from time to time too long, it will accumulate a lot of bacteria, it is best to use a year after the replacement, even if it is taken out clear and clean, it is best to boil water for 10 minutes.
