Reverse Osmosis Filters & Media

We stock a full line of replacement reverse osmosis filters, filter kits, carbon blocks, membranes and deionization resin at affordable prices. All of our filters are produced by American companies with American water quality standards. These trusted brands include: Dow, GE water technologies, MATRIKX, Pentek and Purtrex. All the filters we carry are certified by NSF.


For proper tank maintenance, Bulk Reef Supply recommends changing the filters in your RO/DI System every 6 months. To make re-ordering a breeze, we have created filter kits to match all of our value, standard, chloramines and drinking water systems.

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46 Items

  1. Aqua Pure (1000mL) - Nyos
    Nyos
    Aqua Pure (1000mL) - Nyos
    $29.99

    Earn 29 Reward Points

    $29.99
  2. Matrikx 7 Stage Pro RO/DI Replacement Filter Kit
    Bulk Reef Supply
    Matrikx 7 Stage Pro RO/DI Replacement Filter Kit
    $73.99

    Earn 365 Reward Points Earn 730 Reward Points

    $73.99
    Add to Cart
  3. Matrikx 6 Stage RO/DI Replacement Filter Kit
    Bulk Reef Supply
    Matrikx 6 Stage RO/DI Replacement Filter Kit
    $56.99

    Earn 280 Reward Points Earn 560 Reward Points

    $56.99
    Add to Cart
  4. Matrikx 5 Stage RO/DI Replacement Filter Kit
    Bulk Reef Supply
    Matrikx 5 Stage RO/DI Replacement Filter Kit
    $41.99

    Earn 205 Reward Points Earn 410 Reward Points

    $41.99
    Add to Cart
  5. Matrikx 4 Stage RO/DI Replacement Filter Kit
    Bulk Reef Supply
    Matrikx 4 Stage RO/DI Replacement Filter Kit
    $27.99

    Earn 135 Reward Points Earn 270 Reward Points

    $27.99
    Add to Cart
  6. 4 Stage RO/DI Replacement Filter Kit - Bulk Reef Supply
    Bulk Reef Supply
    4 Stage RO/DI Replacement Filter Kit - Bulk Reef Supply
    $28.99

    Earn 140 Reward Points Earn 280 Reward Points

    $28.99
    Add to Cart
  7. Max Silica Removal Filter Kit (for MaxCap Systems) - Bulk Reef Supply
    Bulk Reef Supply
    Max Silica Removal Filter Kit (for MaxCap Systems) - Bulk Reef Supply
    $51.99

    Earn 255 Reward Points Earn 510 Reward Points

    $51.99
    Add to Cart
  8. BRS Universal Carbon Block Filter - 1 Micron
    Bulk Reef Supply
    BRS Universal Carbon Block Filter - 1 Micron
    $18.99

    Earn 90 Reward Points Earn 180 Reward Points

    $18.99
  9. Pre-Packed Bulk Deionization Resin (Color Changing) - Bulk Reef Supply
    Bulk Reef Supply
    Pre-Packed Bulk Deionization Resin (Color Changing) - Bulk Reef Supply
    $29.99

    Earn 145 Reward Points Earn 290 Reward Points

    $29.99
  10. Triple DI Saver Kit with Resin and TDS Meter - Bulk Reef Supply
    Bulk Reef Supply
    Triple DI Saver Kit with Resin and TDS Meter - Bulk Reef Supply
    $135.99

    Earn 675 Reward Points Earn 1,350 Reward Points

    $135.99
    Add to Cart
  11. BRS Chlorine & VOC Carbon Block Filter - 5 Micron
    Bulk Reef Supply
    BRS Chlorine & VOC Carbon Block Filter - 5 Micron
    $11.99

    Earn 55 Reward Points Earn 110 Reward Points

    $11.99
  12. 4.5
    GE Water Technologies
    4.5" x 20" Aquatrex Depth Sediment Filters - GE Water Technologies

    Starting at: $63.99

    Earn 315 Reward Points Earn 630 Reward Points

  13. PB1 Carbon Block - 0.5 Micron - Matrikx
    Matrikx
    PB1 Carbon Block - 0.5 Micron - Matrikx

    Starting at: $17.99

    Earn 17 Reward Points

  14. CTO Carbon Block - 5 Micron - Matrikx
    Matrikx
    CTO Carbon Block - 5 Micron - Matrikx

    Starting at: $9.49

    Earn 9 Reward Points

  15. 4.5
    GE Water Technologies
    4.5" x 10" Aquatrex Depth Sediment Filters - GE Water Technologies

    Starting at: $26.49

    Earn 130 Reward Points Earn 260 Reward Points

  16. Omnipure 3 Stage RO Replacement Filter Kit
    Omnipure Filters
    Omnipure 3 Stage RO Replacement Filter Kit
    $32.99

    Earn 160 Reward Points Earn 320 Reward Points

    $32.99
    Add to Cart
  17. BRS 4 Stage RO Only Replacement Filter Kit
    Bulk Reef Supply
    BRS 4 Stage RO Only Replacement Filter Kit
    $32.99

    Earn 160 Reward Points Earn 320 Reward Points

    $32.99
    Add to Cart
  18. Matrikx 4 Stage RO (no DI) Replacement Filter Kit
    Bulk Reef Supply
    Matrikx 4 Stage RO (no DI) Replacement Filter Kit
    $22.99

    Earn 110 Reward Points Earn 220 Reward Points

    $22.99
    Add to Cart
  19. Matrikx 4 Stage RO Drinking Water Replacement Filter Kit
    Bulk Reef Supply
    Matrikx 4 Stage RO Drinking Water Replacement Filter Kit
    $37.99

    Earn 185 Reward Points Earn 370 Reward Points

    $37.99
    Add to Cart
  20. BRS 5 Stage RO Drinking Replacement Filter Kit
    Bulk Reef Supply
    BRS 5 Stage RO Drinking Replacement Filter Kit
    $48.99

    Earn 240 Reward Points Earn 480 Reward Points

    $48.99
    Add to Cart
  21. Matrikx 5 Stage Drinking & Reef RO/DI Replacement Filter Kit
    Bulk Reef Supply
    Matrikx 5 Stage Drinking & Reef RO/DI Replacement Filter Kit
    $50.99

    Earn 250 Reward Points Earn 500 Reward Points

    $50.99
    Add to Cart
  22. BRS 5 Stage SPARTAN RO/DI Replacement Filter Kit
    Bulk Reef Supply
    BRS 5 Stage SPARTAN RO/DI Replacement Filter Kit
    $104.99

    Earn 520 Reward Points Earn 1,040 Reward Points

    $104.99
    Add to Cart
  23. BRS 6 Stage Drinking & Reef Replacement Filter Kit
    Bulk Reef Supply
    BRS 6 Stage Drinking & Reef Replacement Filter Kit
    $57.99

    Earn 285 Reward Points Earn 570 Reward Points

    $57.99
    Add to Cart
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