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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).

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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.
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120 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
    $73.79 $89.99

  3. Single Junction Lab Grade pH Probe
    3 Reviews
    Bulk Reef Supply
    Single Junction Lab Grade pH Probe
    $40.99 $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
    $77.89 $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
    $59.99 $59.99

  11. 25-Pack HI70024P 35ppt Salinity Calibration Sachet
    5 Reviews
    Hanna Instruments
    25-Pack HI70024P 35ppt Salinity Calibration Sachet
    $27.00 $27.00

    View Details
  12. Smart Stir - Magnetic Stirrer for Test Kits
    31 Reviews
    AutoAqua
    Smart Stir - Magnetic Stirrer for Test Kits
    $33.59 $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
    $12.79 $15.99

  23. Refractometer Calibration Solution
    14 Reviews
    Bulk Reef Supply
    Refractometer Calibration Solution
    $5.90 $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. MPO Quatro - Magnetic Probe Organizer
    3 Reviews
    AvidAqua
    MPO Quatro - Magnetic Probe Organizer
    $44.95 $44.95

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

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

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

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

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

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

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

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

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

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

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

    Choose Options Notify Me When In-Stock
  40. Aquarium Controller Board Shelf Accessory - Black
    Adaptive Reef
    Aquarium Controller Board Shelf Accessory - Black
    $59.99 $59.99