Orders over $75 ship free using a mix of UPS Ground and SurePost. Your order will arrive within 2-7 days, depending on your vicinity to Minneapolis. Place your order by 3:30 PM CST Monday through Friday and we'll ship it the same day. This offer is only available to the contiguous US. USPS shipments do not qualify for free shipping.
Fast flat-rate shipping $4.99
Select our $4.99 flat-rate shipping option, and your order will arrive to your door within 3 business days or less in the contiguous US. Place your order by 3:30 PM CST Monday through Friday and we'll ship it the same day. See map below for transit times.
Deionization Resin (DI) is the last stage of the RO/DI system and is necessary to reduce Total Dissolved Solids (TDS) to zero. Bulk Reef Supply carries our own BRS brand of DI resin in regular and color changing. Color changing is more convenient for replacement as the color changes from Blue to Brown when the media is exhausted - removing the guesswork. Available in One Cartridge Refill or 1.5 Gallon - both vacuum-sealed for maximum quality preservation. Clear refillable cartridges are available in a variety of sizes - 2.5" x 10" is most popular.