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Controllers & Monitors

Controllers & Monitors

We carry a wide range of aquarium controllers & monitors from American Marine, BioTek Marine, Hanna Instruments, Apogee Instruments, Neptune Systems, Tunze, Hydros & more. If you need help selecting the right product for your budget and needs then please call or email us.

First Time Customers Use Coupon Code: WELCOMEExtra 10% With Account Checkout to Save 10%
15% Off Hanna Instruments & 20% Off ATI Straton LED Lights.

Items 253-288 of 316

Set Descending Direction
  1. Aquatronica Wave Maker Pump Module

    Aquatronica Wave Maker Pump Module

    Special Price $150.00 Regular Price $349.95
    Order by 3:30pm EST for Same Day Shipping (M-F)
    Add to Wish List
  2. Avast Marine Dosing Tube / Probe Holder Combo

    Avast Marine 4 Slot Multi Purpose Magnet Mo... 4 Slot Multi Purpose Magnet Mount

    Special Price $32.99 Regular Price $42.99
    This product will be back ordered
    Add to Wish List
  3. BioTek Marine Salinity Refractometer

    Biotek Marine Salinity Refractometer

    Special Price $29.00 Regular Price $41.99
    Order by 3:30pm EST for Same Day Shipping (M-F)
    Add to Wish List
  4. Reef Octopus Titanium Grounding Probe

    Reef Octopus Titanium Grounding Probe

    $11.54
    This product will be back ordered
    Add to Wish List
  5. Ecotech Marine ReefLink

    Ecotech Marine ReefLink

    $199.99
    Special Order (6 - 8 week lead time)
    Add to Wish List
  6. Hanna HI758 Calcium Checker Marine

    Hanna Instruments HI758 Calcium Checker Marine

    $64.95
    Order by 3:30pm EST for Same Day Shipping (M-F)
    Add to Wish List
  7. Hanna HI717 Checker Phosphate High Range

    Hanna Instruments HI717 Checker Phosphate High R... HI717 Checker Phosphate High Range

    $64.95
    This product will be back ordered
    Add to Wish List
  8. Hanna Instruments Edge pH Meter

    Hanna Instruments Edge pH Meter

    $456.00
    Call For Availability
    Add to Wish List
  9. Hanna HI718-11 Calibration Checking Set

    Hanna Instruments HI718-11 Calibration Checking ... HI718-11 Calibration Checking Set

    $14.00
    This product will be back ordered
    Add to Wish List
  10. HM Digital PH-200

    HM Digital PH-200 Waterproof pH Meter

    $74.99
    This product will be back ordered
    Add to Wish List
  11. Lifegard LED Digital Thermometer

    Lifegard Aquatics LED Digital Thermometer

    $25.25
    Order by 3:30pm EST for Same Day Shipping (M-F)
    Add to Wish List
  12. Lifegard Big Digital temp Alert

    Lifegard Aquatics Digital Thermometer / Hygrometer

    $42.47
    This product will be back ordered
    Add to Wish List
  13. Milwaukee Digital Seawater Refractometer

    Milwaukee MA887 Digital Seawater Refractometer

    $124.99
    This product will be back ordered
    Add to Wish List
  14. Milwaukee MW100 Portable pH Meter

    Milwaukee MW100 Portable pH Meter

    $85.00
    This product will be back ordered
    Add to Wish List
  15. Milwaukee MC122 pH Controller

    Milwaukee MC122 pH Controller

    $146.00
    This product will be back ordered
    Add to Wish List
  16. Milwaukee MA957 C02 Regulator

    Milwaukee MA957 C02 Regulator

    $109.99
    Ships in 1-2 Days
    Add to Wish List
  17. Neptune Systems Apex/Jr Temperature Probe

    Neptune Systems Apex/Jr Temperature Probe

    $34.99
    This product will be back ordered
    Add to Wish List
  18. Neptune Systems Lab Grade Conductivity Probe

    Neptune Systems Lab Grade Salinity / Conductiv... Lab Grade Salinity / Conductivity Probe

    $209.99
    Usually Ships in 1 - 2 Business Days After Submission of Order
    Add to Wish List
  19. Advanced Leak Detection Solid Surface Probe

    Neptune Systems Advanced Leak Detection Solid ... Advanced Leak Detection Solid Surface Probe

    $31.99
    Order by 3:30pm EST for Same Day Shipping (M-F)
    Add to Wish List
  20. Neptune Systems Energy Bar 8

    Neptune Systems Energy Bar 8

    $149.95
    Discontinued
    Out of stock
    Add to Wish List
  21. Neptune EnergyBar 4

    Neptune Systems Energy Bar 4

    $125.99
    Usually Ships In 2 - 3 Business Days After Submission of Order
    Out of stock
    Add to Wish List
  22. Neptune Systems VDM Dimming Cable for VDM Module

    Neptune Systems VDM Dimming Cable for VDM Module

    $17.95
    This product will be back ordered
    Add to Wish List
  23. Neptune Systems Advanced LED Dimming Module NEP-VDM

    Neptune Systems Advanced LED Dimming Module NE... Advanced LED Dimming Module NEP-VDM

    $109.99
    Order by 3:30pm EST for Same Day Shipping (M-F)
    Add to Wish List
  24. Neptune PM3 Disolved Oxygen, Temperature, I/O Expansion Box

    Neptune Systems PM3 Disolved Oxygen, Temperatu... PM3 Disolved Oxygen, Temperature, I/O Expansion Box

    $104.99
    This product will be back ordered
    Add to Wish List
  25. Neptune PM2 Conductivity, Temp, I/O Expansion

    Neptune Systems PM2 Conductivity, Temp, I/O Ex... PM2 Conductivity, Temp, I/O Expansion

    $94.99
    Usually Ships in 1 - 2 Business Days After Submission of Order
    Add to Wish List
  26. Neptune Systems PM1 pH/ORP Probe Module

    Neptune Systems PM1 pH/ORP Probe Module

    $94.99
    This product will be back ordered
    Add to Wish List
  27. Neptune Systems DOS Dosing and Fluid Metering System

    Neptune Systems DOS Quiet Drive Dosing & F... DOS Quiet Drive Dosing & Fluid Metering System

    $349.99
    Preorder
    Add to Wish List
  28. Neptune Systems DOS Dosing and Fluid Metering System

    Neptune Systems DOS Dosing and Fluid Metering ... DOS Dosing and Fluid Metering System

    Rating:
    87%
    1  Review
    $349.99
    Usually Ships in 1 - 2 Business Days After Submission of Order
    Add to Wish List
  29. Neptune Systems DDR - DOS Dual Reservoir

    Neptune Systems DDR - DOS Dual Reservoir

    $215.99
    This product will be back ordered
    Add to Wish List
  30. Neptune Systems Automatic Feeding System NEP-AFS

    Neptune Systems Automatic Feeding System NEP-AFS

    $115.99
    Usually Ships in 1 - 2 Business Days After Submission of Order
    Add to Wish List
  31. Advanced Leak Detection Low Profile Probe

    Neptune Systems Advanced Leak Detection Low Pr... Advanced Leak Detection Low Profile Probe

    Special Price $22.99 Regular Price $31.99
    Order by 3:30pm EST for Same Day Shipping (M-F)
    Add to Wish List
  32. Neptune Systems Lunar Simulator Module

    Neptune Systems Lunar Simulator Module

    $74.99
    Factory Direct - Usually Ships Out Within 3-4 Days
    Add to Wish List
  33. Neptune Systems Base Module

    Neptune Systems Apex Base Module

    $274.95
    Usually Ships in 1 - 2 Business Days After Submission of Order
    Add to Wish List
  34. Neptune Systems I/O Breakout Box

    Neptune Systems I/O Breakout Box

    $47.99
    This product will be back ordered
    Add to Wish List
  35. Neptune Systems MPR Magnetic Probe Rack

    Neptune Systems MPR Magnetic Probe Rack

    $44.95
    Usually Ships in 1 - 2 Business Days After Submission of Order
    Add to Wish List
  36. Neptune Systems Oxyguard Dissolved Oxygen Probe

    Neptune Systems Oxyguard Dissolved Oxygen Prob... Oxyguard Dissolved Oxygen Probe With 10' Cable

    $789.99
    Usually Ships in 1 - 2 Business Days After Submission of Order
    Add to Wish List
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