• Large granules of activated natural zeolite for use in garden pond filters.

• Removes ammonia from water

• Granule size from 8 to 16mm

• Net weight = 1400g approx.

• Ideal for use garden ponds to control ammonia levels

ZN AQUA is an excellent filter medium for garden ponds as it captures ammonium ions due to its natural cation exchange capacity and high affinity for ammonia. It also acts as a host for the beneficial bacteria which colonise the microporous stucture and then work to break down the captured ammonia. It is an efficient solid particle filter also, and can remove solid particles down to 5 microns, keeping the water crystal clear. 

These 8-16mm granules are ideal for use directly in garden ponds and in pond filters.