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Collection: Controllers & Testing

Test kits, checkers, monitors, and controllers for freshwater and reef aquariums — from single-parameter reagent kits to full tank automation. A reagent kit answers one question once; a controller keeps answering it.

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264 products

Neptune Magnetic Probe Rack

Neptune Magnetic Probe Rack

Regular price $99.99 CAD
$99.99 CAD
Neptune Trident Reagents  economy pack on sale

ABC Reagents for Auto Testers - 6 Month Supply

5.0 out of 5 stars, 1 review
Regular price $114.95 CAD
$114.95 CAD
API Phosphate Test Kit

API Phosphate Test Kit

5.0 out of 5 stars, 2 reviews
Regular price $19.55 CAD
$19.55 CAD
Salifert Potassium Test Kit

Salifert Potassium Test Kit

4.0 out of 5 stars, 1 review
Regular price $23.95 CAD
$23.95 CAD
Pinpoint ORP Calibration Solution

Pinpoint ORP Calibration Solution

Regular price $5.25 CAD
$5.25 CAD
Neptune Trident Testing System

Neptune Trident Testing System

Regular price $929.99 CAD
$929.99 CAD
Hanna Phep4 pH/Temperature Tester - HI98127

Hanna Phep4 pH/Temperature Tester - HI98127

Regular price $149.95 CAD
$149.95 CAD
Hanna Magnesium Checker Reagent

Hanna Magnesium Checker Reagent

Regular price $26.95 CAD
$26.95 CAD
Neptune Apex 24VDC Solenoid Valve

Neptune Apex 24VDC Solenoid Valve

Regular price $79.99 CAD
$79.99 CAD
Neptune Apex Temperature Probe

Neptune Apex Temperature Probe

Regular price $79.99 CAD
$79.99 CAD
API Reef Master Test Kit

API Reef Master Test Kit

3.0 out of 5 stars, 2 reviews
Regular price $55.00 CAD
$55.00 CAD
Hanna pH Tester - HI98103

Hanna pH Tester - HI98103

Regular price $54.95 CAD
$54.95 CAD
Pinpoint pH Monitor

Pinpoint pH Monitor

Regular price $122.35 CAD
$122.35 CAD
Neptune Trident NP Reagent 2 Month Kit

Neptune Trident NP Reagent 2 Month Kit

5.0 out of 5 stars, 2 reviews
Regular price $84.99 CAD
$84.99 CAD
API Low Range pH (Freshwater) Test Kit

API Low Range pH (Freshwater) Test Kit

Regular price $9.65 CAD
$9.65 CAD
API Nitrite Test Kit

API Nitrite Test Kit

Regular price $14.65 CAD
$14.65 CAD
API High Range pH (Marine) Test Kit

API High Range pH (Marine) Test Kit

4.5 out of 5 stars, 2 reviews
Regular price $10.55 CAD
$10.55 CAD
Salifert Copper Test Kit

Salifert Copper Test Kit

Regular price $21.95 CAD
$21.95 CAD
Pinpoint ORP Monitor

Pinpoint ORP Monitor

Regular price $186.00 CAD
$186.00 CAD
Neptune pH Probe

Neptune pH Probe

Regular price $184.99 CAD
$184.99 CAD

From a Test Kit to a Full Controller

Keeping stable water starts with knowing your numbers. Where you land on that spectrum depends on how demanding your livestock is and how much you want automated. We carry testing and control gear from Hanna, Salifert, API, Neptune, Pinpoint, Milwaukee, and Red Sea.

Match the Tool to the Tank

  • Reagent test kits — Salifert and API titration kits for periodic manual checks.
  • Digital checkers — Hanna colorimeters for repeatable calcium, alkalinity, phosphate, and nitrate readings.
  • Meters & probes — pH, salinity, and temperature monitors with calibration solutions.
  • Controllers — Neptune Apex systems that log parameters and switch equipment automatically.

A freshwater community tank runs fine on a master kit and a thermometer. A mixed reef under heavy dosing benefits from checkers and a controller that can catch a heater or return-pump failure before it costs livestock. Not sure where you sit? Email sales@jlaquatics.com. J&L has outfitted Canadian aquarists since 1997.

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.