Filter Bio Chem is a biological filtration medium that provides a substrate for optimal growth of beneficial bacteria. The internal pore structure is formed under a patented process that creates a 50 to 70 micron pore network, which is optimal for beneficial bacteria. To use, rinse the bio-chem stars in tap to remove any dust and then place it into the compartment in the filter. Bio Chem starts will become colonized with bacteria within several weeks. It does not degrade and does not need to be replaced. One 20-count bag should be used for every 100 US gallons. One bag grows massive colonies of beneficial bacteria and provides more growing area than plastic balls, foam, or under-gravel fillers. It also allows for best oxygen and water transfer, leading to optimal bacterial health.
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