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Improves plant respiration
and boosting overall vigor
Important: These units require certified HVAC-professional installation
New & Improved Concentrated Formula
Kootenay Filter KFI 500 Standard Line Pre-Filter Harvest Improves plant respirationReplacement Pre Filters extend the life of your filter by blocking larger particulate from entering and contaminating the filter. Pre Filters available in all sizes for Green Line Carbon Filters as well as Standard Line Carbon Filters
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