Product characteristics: 1. The filter material was formed through special burn with a variety of synthetic raw materials, which has continuous open pore structure. 2. At the beginning of the opening cylinder, fliter material can capture suspended particles, organic matter micelle and some of pigment which makes aquarium water clear rapidly. 3. The special genes in the surface of filter material can attract the nitrifying bacteria adhesion which makes better biological compatibility with denitrifying bacteria. 4. The PH of filter material is neutral and the effect to aquatic GH is low. Method of application: 1. Please put it in biological filter tank, please use fiber cotton or biochemical cotton for prefiltering to facilitate microbial cultures. 2. Replace the portion filter in six months to one year is suggested based on filter material usage and breeding density, please do not replace all filters which could not to damages the ecosystem and water quality shocks. The main chemical composition of the hollow bio-ceramics is neutral Al2O3 and SiO2, the chemical composition is stable, can not bring harmful substance, the low content of alkaline earth oxides in the chemical composition will not cause the change of water quality, the rare earth element will release slowly, create a suitable living environment.

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