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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

Hanna Calcium Checker Reagents - 25 Pack

Hanna Calcium Checker Reagents - 25 Pack

Regular price $45.95 CAD
$45.95 CAD
Pinpoint pH Probe Replacement

Pinpoint pH Probe Replacement

3.5 out of 5 stars, 2 reviews
Regular price $59.70 CAD
$59.70 CAD
Salifert Ammonia Test Kit

Salifert Ammonia Test Kit

Regular price $17.95 CAD
$17.95 CAD
API Ammonia Test Kit

API Ammonia Test Kit

Regular price $20.65 CAD
$20.65 CAD
API GH/KH Freshwater Test Kit

API GH/KH Freshwater Test Kit

5.0 out of 5 stars, 2 reviews
Regular price $15.45 CAD
$15.45 CAD
Hanna Phosphorus Checker

Hanna Phosphorus Checker - Low Range

4.3 out of 5 stars, 3 reviews
Regular price $77.95 CAD
$77.95 CAD
API Nitrate Test Kit

API Nitrate Test Kit

Regular price $18.05 CAD
$18.05 CAD
API Calcium Test Kit

API Calcium Test Kit

Regular price $16.65 CAD
$16.65 CAD
Hanna Copper High Range Checker

Hanna Copper High Range Checker

4.0 out of 5 stars, 1 review
Regular price $77.95 CAD
$77.95 CAD
API 5-in-1 Test Strips

API 5-in-1 Test Strips

1.0 out of 5 stars, 1 review
Regular price $20.15 CAD
$20.15 CAD
Salifert pH Test Kit

Salifert pH Test Kit

Regular price $13.95 CAD
$13.95 CAD
API Alkalinity (KH) Test Kit

API Alkalinity (KH) Test Kit

Regular price $10.75 CAD
$10.75 CAD
API Saltwater Master Test Kit

API Saltwater Master Test Kit

4.0 out of 5 stars, 1 review
Regular price $46.80 CAD
$46.80 CAD
Neptune Conductivity Calibration Solution

Neptune Conductivity Calibration Solution - 53.0 mS

Regular price $9.99 CAD
$9.99 CAD
Hanna Phosphate Checker

Hanna Phosphate Checker - Low Range

3.7 out of 5 stars, 3 reviews
Regular price $77.95 CAD
$77.95 CAD
Coralife Deep Six Hydrometer

Coralife Deep Six Hydrometer

5.0 out of 5 stars, 1 review
Regular price $19.55 CAD
$19.55 CAD
Salifert Nitrite Test Kit

Salifert Nitrite Test Kit

Regular price $14.95 CAD
$14.95 CAD
Neptune Trident Reagent 2

Neptune Trident Reagent 2

5.0 out of 5 stars, 1 review
Regular price $71.99 CAD
$71.99 CAD
Hanna Marine pH Checker

Hanna Marine pH Checker

5.0 out of 5 stars, 1 review
Regular price $77.95 CAD
$77.95 CAD
Seneye Slide Pack (3 Piece)

Seneye Slide Pack (3 Piece)

Regular price $60.20 CAD
$60.20 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.