Pond Biological Filter Media
Biological filter material encourages growth of beneficial bacteria breaking down toxic ammonia & nitrites into nitrates. Biological filter material comes in the form of bio-balls or bio-spheres. These balls then become a host for colonizing biological bacteria to grow and multiply. Liquid biological starters are ideal for quickly boosting the nitrogen cycle, especially after increasing the number of live fish which have been added to the pond, before the filter system can catch up on its own with bacteria growth.