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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

Red Sea Iodine Pro Test Kit contents

Test Kit

Red Sea Iodine Pro Test Kit

Regular price $86.99
Sale price $86.99 Regular price
Hydros Flow Sensor - 1 Inch

Aquarium Monitor

Hydros Flow Sensor - 1 Inch

Regular price $106.60
Sale price $106.60 Regular price
Hydros Control Power Supply

Aquarium Monitor

Hydros Control Power Supply

Regular price $49.95
Sale price $49.95 Regular price
Hydros Control XD Aquarium Controller

Aquarium Monitor

Hydros Control XD

Regular price $241.52
Sale price $241.52 Regular price $352.60
Hydros Control X3/XP8 Pro Pack components and accessories for an aquarium.

Aquarium Monitor

Hydros Control X3/XP8 Pro Pack

Regular price $592.31
Sale price $592.31 Regular price $864.75
Hydros Control X3

Aquarium Monitor

Hydros Control X3

Regular price $277.76
Sale price $277.76 Regular price $352.60
Pinpoint Alkaline Water Polishing Strip

Aquarium Monitor

Pinpoint Alkaline Water Polishing Strip

Regular price $9.00
Sale price $9.00 Regular price $11.80
Vivid Creative Salinity Probe Stability Kit

Controller Accessory

Vivid Creative Salinity Probe Stability Kit

Regular price $23.43
Sale price $23.43 Regular price $38.55
Hydros Dual Inline TDS Meter

Aquarium Monitor

Hydros Dual Inline TDS Meter

Regular price $67.82
Sale price $67.82 Regular price $86.10
Coralvue Controllers & Monitors

Aquarium Monitor

Hydros Tunze Wave Engine Pump Adapter

Regular price $25.40
Sale price $25.40 Regular price
Hydros DC Solenoid Water Valve

Aquarium Monitor

Hydros DC Solenoid Water Valve

Regular price $42.65
Sale price $42.65 Regular price
Hydros 0-10v Quad Wave Engine Pump Adapter

Aquarium Monitor

Hydros 0-10v Quad Wave Engine Pump Adapter

Regular price $22.15
Sale price $22.15 Regular price
Hydros Wave Ice Cap Gyre Engine Pump Adapter

Aquarium Monitor

Hydros Wave Ice Cap Gyre Engine Pump Adapter

5.0 out of 5 stars, 1 review
Regular price $20.50
Sale price $20.50 Regular price
Hydros Varios/Pulse Wave Engine Pump Adapter

Aquarium Monitor

Hydros Varios/Pulse Wave Engine Pump Adapter

Regular price $20.50
Sale price $20.50 Regular price
Hydros Wave Maxspect 330/350 Gyre Engine Pump Adapter

Aquarium Monitor

Hydros Wave Maxspect 330/350 Gyre Engine Pump Adapter

Regular price $20.50
Sale price $20.50 Regular price
Hydros Skimmer Sensor

Aquarium Monitor

Hydros Skimmer Sensor

Regular price $68.85
Sale price $68.85 Regular price
Coralvue Controllers & Monitors

Aquarium Monitor

Hydros 3.5mm Adapter Cable

Regular price $15.68
Sale price $15.68 Regular price $21.35
Neptune Leak Detection Kit (LDK)

Aquarium Monitor

Neptune Leak Detection Kit (LDK)

Regular price $203.47
Sale price $203.47 Regular price $284.99
Hydros Wave Maxspect 150/250/280 Gyre Engine Pump Adapter

Aquarium Monitor

Hydros Wave Maxspect 150/250/280 Gyre Engine Pump Adapter

Regular price $20.50
Sale price $20.50 Regular price
Hydros Leak Detection Sensor

Aquarium Monitor

Hydros Leak Detection Sensor

Regular price $68.85
Sale price $68.85 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.