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Collection: Controllers & Testing

Testing and monitoring gear for freshwater and reef tanks: reagent kits, digital checkers, meters, probes, and automated controllers. Manual kits confirm a number; controllers watch it around the clock.

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265 products

Neptune Apex 2 Channel Stream Cable

Aquarium Monitor

Neptune Apex 2 Channel Stream Cable

4.0 out of 5 stars, 1 review
Regular price $47.99
Sale price $47.99 Regular price
Neptune Oxyguard Probe with Cable

Controller Accessory

Neptune Oxyguard Probe with Cable

Regular price $1,277.99
Sale price $1,277.99 Regular price
Neptune Systems Apex Power Supply

Aquarium Monitor

Neptune Apex Power Supply

Regular price $39.99
Sale price $39.99 Regular price
Neptune Variable Speed/Dimming Module (VDM)

Aquarium Monitor

Neptune Variable Speed/Dimming Module (VDM)

Regular price $199.99
Sale price $199.99 Regular price
Neptune 2 Channel Apex to Light Dimming Cable

Aquarium Monitor

Neptune 2 Channel Apex to Light Dimming Cable

Regular price $39.99
Sale price $39.99 Regular price

You Can't Correct What You Haven't Measured

Stable water chemistry is the difference between a thriving tank and a stalled one. Testing tells you where you stand; monitors and controllers keep watch when you're not looking.

Levels of Testing and Control

  • Manual test kits — titration-based kits for periodic checks of the core parameters.
  • Digital checkers — handheld colorimeters that remove the guesswork of reading color charts.
  • Continuous monitors — pH, salinity, and temperature meters with calibration solutions.
  • Automation — controllers that log data and switch equipment on set conditions.

A simple community setup needs little more than a master kit. A demanding reef under active dosing earns its keep from digital checkers and a controller that reacts to a failure faster than you can. Choose the level that matches how much risk your livestock represents. Not sure which tier fits your tank? Email info@jlaquatics.com.

J&L Aquatics was formed in December 1997

Our business was started from our love of the aquarium hobby. We at J&L Aquatics felt that the Canadian aquarist should have the option to purchase top quality supplies, equipment and livestock other than the generally over priced local retail stores.