VarroxSan® Oxalic Acid Mite Strips A long-awaited breakthrough in varroa mite control is finally here. VarroxSan® is a slow-release oxalic acid treatment that delivers powerful, sustained protection—without disrupting your hive or your honey flow. Made from fiberboard strips infused with oxalic acid dihydrate, VarroxSan offers targeted, long-lasting action across multiple mite life cycles. With an average efficacy rate of 96.8%, it’s a simple, single-application solution you can count on throughout the season—even when honey supers are present. Why Beekeepers Love VarroxSan®: Naturally derived: Oxalic acid is an organic compound found in many plants No detectable residues in wax or honey Safe for bees – no impact on brood or adult population Effective against resistant mites (amitraz & pyrethroids) No withdrawal time USDA-approved for use during honey flow How to Use: Use 1 strip per 2.5 brood frames (covered with bees) For medium boxes: 1 strip per 5 frames of bees Fold strip and insert between brood frames Leave in hive for 42–56 days Whether you're running a small apiary or managing dozens of colonies, VarroxSan brings you a clean, efficient, and organic-friendly way to keep varroa in check. Please note: This product is available for shipping to the contiguous 48 United States, excluding California. A shipping state must be selected before the item can be added to your cart.