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ATTENTION TO EVERYBODY ! ! ! CARBON FILTERS WORK ONLY UNDER HIGH PRESSURE OF AIR. This meens that if you put a low power fan (like a PC fan) YOU DO NONTHING! Also if the whole system is not well insulated (airproof from the entrance of the filter to the end of the fan) YOU DO NOTHING. I...

Does anyone have the idea of how small does the particles of the carbon have to be? If you break it like dust works better than 3 mm particles? I bought from fish store a galon of carbon but the particles where too BIG (like >6mm) so the odor was passing between the carbon particles and was...