It has a sponge inside that I was advised to clean every 2 weeks when I do a 30% water change. The instructions don tell me how it filters and I don understand how it can filter biologically???
Related Questions
- It has a sponge inside that I was advised to clean every 2 weeks when I do a 30% water change. The instructions don tell me how it filters and I don understand how it can filter biologically???
- I clean it entirely about once every 6 weeks ie: put fish in small tank and drain and replace water entirely in big tank. Do I need to do that, or is there another way to clean a 10 gallon tank?
- How to clean water?
