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.

Filter Kit Sale - Save 15% on BRS filter kits


Featured Products:

View as Grid List
Set Descending Direction

39 Items

  1. BRS 7 Stage Pro Replacement Filter Kit
    Bulk Reef Supply
    7 Stage Pro RO/DI Replacement Filter Kit - Bulk Reef Supply
    $59.49

    Earn 590 Reward Points Earn 295 Reward Points

    $69.99
    Add to Cart
  2. BRS 6 Stage RO/DI Replacement Filter Kit
    Bulk Reef Supply
    6 Stage RO/DI Replacement Filter Kit - Bulk Reef Supply
    $52.69

    Earn 520 Reward Points Earn 260 Reward Points

    $61.99
    Add to Cart
  3. BRS 5 Stage RO/DI Replacement Filter Kit
    Bulk Reef Supply
    5 Stage RO/DI Replacement Filter Kit - Bulk Reef Supply
    $44.19

    Earn 440 Reward Points Earn 220 Reward Points

    $51.99
    Add to Cart
  4. BRS 4 Stage Value Replacement Filter Kit
    Bulk Reef Supply
    BRS 4 Stage Value Replacement Filter Kit
    $26.34

    Earn 260 Reward Points Earn 130 Reward Points

    $30.99
    Add to Cart
  5. Filter Kit Sale - Save 15% on BRS filter kits

  6. DI Resin 1000mL - Triton
    Triton
    DI Resin 1000mL - Triton
    $38.00

    Earn 38 Reward Points

    $38.00
  7. Case (20) 10" - 5 Micron MATRIKX CTO Carbon Block - Matrikx
    Matrikx
    Case (20) 10" - 5 Micron MATRIKX CTO Carbon Block - Matrikx
    $127.99

    Earn 127 Reward Points

    $127.99
View as Grid List
Set Descending Direction

39 Items