Biological filters NITRIFIL are effective, compact and without maintenance. Manufactured in high density food grade polyethylene , they can be used for the closed systems in fresh or salted water. Our bacterial filters are vertical type gravitating with cone of accumulation of the sediments and valve of drainage for a simple and fast maintenance.
The secrecy of this filter resides in the excellent performance of its polystyrene media. These media have a natural electrostatic property attracting the nitrifying bacteria of negative Gram. Moreover, it resists filling, does not compact themselves and ensures a constant redistribution of water in order to keep all surfaces constantly wet. The distribution of water is one of the assets of this filter, a special jet distributor at the water entry ensures a maximization of the use of surfaces and a minimum of restriction. The sufficiently broad opening of this jet ensures a good flow, resists filling and gets an effective degasification. On all our biofiltres, an air intake with valve makes it possible to add ventilation to increase the effectiveness of degasification.
With these biofilters it is possible to recirculate up to 99,9% of the water flow. A minimal water flow must be maintained in the biofilter to ensure a constant bacterial development and to prevent the accumulation of sediments. A valve of drainage in the bottom of the cone allows a simple and fast maintenance.