Pond Filter Wool blue
Filter wool with a coarse structure for the first dirt catch
Excellent for biological filtration. Made from first-grade nylon fibre, which is very elastic and has a long lifetime. Universal filter wool with a large dirt catch and filter capacity. Its water permeability is large and the wool can be rinsed often.
Tip: the activity of filter wool will decrease after one season. The best thing you can do is to replace them in spring.