Unlike the traditional gravel or sand, AquaInset is able to trap and filter not only mechanical impurities, but also adsorb harmful substances. This is especially the case of ammonia produced in fish excrements, which in increased quantities can be toxic to fish and lead to problems over time. With one spoon of zeolite gravel AquaInset, we get a cleaning filtration area as large as a tennis court. Enhanced filtration performance can be achieved by supplementing the filtration sand for zeolite filter insert AquaFilter. Zeolit is also a popular filtration medium for cleaning pools and garden ponds. It adsorbs unwanted harmful agents into its internal structure and thus keeps the water clean and healthy. Apart from ammonia, zeolite adsorbs disagreeable odours, modifies the pH value and prevents the formation of algae.