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0% Financing with Affirm For Qualified Buyers

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Aperture Business New Website Reminder

We are now transitioning all ordering of Neptune Systems, EcoTech Marine, AquaIllumination, Bulk Reef Supply Wholesale, and all of our Aperture Exclusive Distribution Brands to the new Aperture Business website (aperturebusiness.com).

If we have not yet moved your account, we need your basic information to complete that transition.

Please Complete This Form

Please complete the form linked above as soon as possible to get started.

If you have any questions, please contact your Aperture sales representative.

Probes & Controller Accessories

Aquarium controllers have seemingly endless probes and add-ons to help you achieve your reefing goals. Here you'll find everything from replacement probes, maintenance items, accessories, and controller add-ons for the most popular brands like Apex, GHL, and Hydros.

Review and Win
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111 Items

  1. Probe Calibration Kit - ph 7.0, ph 10.0, & Salinity 53000uS
    1 Review
    Neptune Systems
    Probe Calibration Kit - ph 7.0, ph 10.0, & Salinity 53000uS
    $9.99 $9.99

  2. Double Junction Lab Grade pH Probe
    15 Reviews
    Bulk Reef Supply
    Double Junction Lab Grade pH Probe
    $89.99 $89.99

  3. Single Junction Lab Grade pH Probe
    3 Reviews
    Bulk Reef Supply
    Single Junction Lab Grade pH Probe
    $49.99 $49.99

  4. Lab Grade Double Junction pH Probe
    10 Reviews
    Neptune Systems
    Lab Grade Double Junction pH Probe
    $119.99 $119.99

  5. Double Junction Lab Grade ORP Probe
    Bulk Reef Supply
    Double Junction Lab Grade ORP Probe
    $94.99 $94.99

  6. Lab Grade Double Junction ORP Probe
    Neptune Systems
    Lab Grade Double Junction ORP Probe
    $129.99 $129.99

  7. Lab Grade Conductivity/Salinity Probe
    69 Reviews
    Neptune Systems
    Lab Grade Conductivity/Salinity Probe
    $249.99 $249.99

  8. Salinity Probe Stability Kit (SPS)
    11 Reviews
    Vivid Creative Aquatics
    Salinity Probe Stability Kit (SPS)
    $27.95 $27.95

  9. Temperature Probe
    18 Reviews
    Neptune Systems
    Temperature Probe
    $49.99 $49.99

  10. HI98509 Checktemp 1 Digital Thermometer
    11 Reviews
    Hanna Instruments
    HI98509 Checktemp 1 Digital Thermometer
    $62.99 $62.99

  11. 25-Pack HI70024P 35ppt Salinity Calibration Sachet
    5 Reviews
    Hanna Instruments
    25-Pack HI70024P 35ppt Salinity Calibration Sachet
    $39.99 $39.99

    View Details
  12. Smart Stir - Magnetic Stirrer for Test Kits
    31 Reviews
    AutoAqua
    Smart Stir - Magnetic Stirrer for Test Kits
    $31.49 $41.99

  13. Standard Aquarium Controller Board
    6 Reviews
    Adaptive Reef
    Standard Aquarium Controller Board
    From: $153.99

    Choose Options Notify Me When In-Stock
  14. MXM Mobius Wireless Control Module
    22 Reviews
    Neptune Systems
    MXM Mobius Wireless Control Module
    $139.99 $139.99

  15. 7.00 pH Calibration Fluid
    Neptune Systems
    7.00 pH Calibration Fluid
    $4.99 $4.99

  16. 10.00 pH Calibration Fluid
    1 Review
    Neptune Systems
    10.00 pH Calibration Fluid
    $4.99 $4.99

  17. Neptune Systems Conductivity Calibration Solution - 53000 Microsiemens
    7 Reviews
    Neptune Systems
    Neptune Systems Conductivity Calibration Solution - 53000 Microsiemens
    $5.99 $5.99

  18. Milwaukee pH Calibration Fluid - Single Use Packet
    36 Reviews
    Milwaukee Instruments
    Milwaukee pH Calibration Fluid - Single Use Packet
    From: $1.59

    Choose Options Notify Me When In-Stock
  19. 7.01 Calibration Solution Box of 25 - Milwaukee
    Milwaukee Instruments
    7.01 Calibration Solution Box of 25 - Milwaukee
    $22.99 $22.99

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  20. 10.01 Calibration Solution Box of 25 - Milwaukee
    Milwaukee Instruments
    10.01 Calibration Solution Box of 25 - Milwaukee
    $22.99 $22.99

    View Details
  21. 4.01 Calibration Solution Box of 25 - Milwaukee
    Milwaukee Instruments
    4.01 Calibration Solution Box of 25 - Milwaukee
    $22.99 $22.99

    View Details
  22. Watchdog Leak Detection Alarm
    7 Reviews
    Glentronics
    Watchdog Leak Detection Alarm
    $15.99 $15.99

  23. Refractometer Calibration Solution
    14 Reviews
    Bulk Reef Supply
    Refractometer Calibration Solution
    $7.19 $7.19

  24. MPR Magnetic Probe Rack
    80 Reviews
    Neptune Systems
    MPR Magnetic Probe Rack
    $59.99 $59.99

  25. CustomCradle Pro Tube Holder
    Innovative Marine
    CustomCradle Pro Tube Holder
    $28.80 $36.00

  26. CustomCradle Pro Probe Holder
    1 Review
    Innovative Marine
    CustomCradle Pro Probe Holder
    $28.80 $36.00

  27. MPO Duo - Magnetic Probe Organizer
    1 Review
    AvidAqua
    MPO Duo - Magnetic Probe Organizer
    $39.95 $39.95

  28. MTO - Magnetic Tubing Organizer
    1 Review
    AvidAqua
    MTO - Magnetic Tubing Organizer
    $44.95 $44.95

  29. LLS Liquid Level Sensor
    29 Reviews
    Neptune Systems
    LLS Liquid Level Sensor
    From: $59.99

    Choose Options Notify Me When In-Stock
  30. LD-3 Optical Multi-Surface Leak Sensor
    2 Reviews
    Neptune Systems
    LD-3 Optical Multi-Surface Leak Sensor
    $59.99 $59.99

  31. MOS Magnetic Optical Sensor
    10 Reviews
    Neptune Systems
    MOS Magnetic Optical Sensor
    $59.99 $59.99

  32. OS-1 Optical Level Sensor V2
    19 Reviews
    Neptune Systems
    OS-1 Optical Level Sensor V2
    $39.99 $39.99

  33. LD-2 Solid Surface Leak Detection Probe
    1 Review
    Neptune Systems
    LD-2 Solid Surface Leak Detection Probe
    $49.99 $49.99

  34. LD-1 Low Profile Leak Detection Probe
    1 Review
    Neptune Systems
    LD-1 Low Profile Leak Detection Probe
    $49.99 $49.99

  35. Replacement Dissolved Oxygen Probe Membrane Kit
    Neptune Systems
    Replacement Dissolved Oxygen Probe Membrane Kit
    $99.99 $99.99

  36. Low-Profile Advanced Leak Detection Probe
    4 Reviews
    Neptune Systems
    Low-Profile Advanced Leak Detection Probe
    $39.99 $39.99

  37. Solid Surface Advanced Leak Detection Probe
    16 Reviews
    Neptune Systems
    Solid Surface Advanced Leak Detection Probe
    $39.99 $39.99

  38. Refractometer & Hydrometer Calibration Standard
    5 Reviews
    Brightwell Aquatics
    Refractometer & Hydrometer Calibration Standard
    From: $6.13

    Choose Options Notify Me When In-Stock
  39. Replacement Probe for Aquarium Temperature Controllers
    1 Review
    Ink Bird
    Replacement Probe for Aquarium Temperature Controllers
    $8.99 $8.99

  40. PINPOINT pH Replacement Probe Inc.
    18 Reviews
    American Marine
    PINPOINT pH Replacement Probe Inc.
    $49.99 $49.99