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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 Apex EnergyBar 832

Neptune Apex EnergyBar 832

Regular price $469.99 CAD
$469.99 CAD
Salifert Freshwater Test Kit - GH

Salifert Freshwater Test Kit - GH

5.0 out of 5 stars, 1 review
Regular price $9.45 CAD
$9.45 CAD
Salifert Freshwater Test Kit - Nitrate

Salifert Freshwater Test Kit - Nitrate

5.0 out of 5 stars, 1 review
Regular price $15.95 CAD
$15.95 CAD
Seneye Reef Monitor for aquariums

Seneye Reef Monitor

5.0 out of 5 stars, 1 review
Regular price $315.00 CAD
$315.00 CAD
Neptune Apex FMM Optical Sensor

Neptune Apex FMM Optical Sensor

Regular price $64.99 CAD
$64.99 CAD
Red Sea Reef Foundation Pro Test Kit

Red Sea Reef Foundation Pro Test Kit

Regular price $115.99 CAD
$115.99 CAD
Neptune Apex Flow Monitoring Module (FMM)

Neptune Apex Flow Monitoring Module (FMM)

Regular price $229.99 CAD
$229.99 CAD
Red Sea Marine Care Program Master Test Kit

Red Sea Marine Care Program Master Test Kit

5.0 out of 5 stars, 1 review
Regular price $115.99 CAD
$115.99 CAD
Hanna PH/Conductivity/TDS Tester - HI98129

Hanna PH/Conductivity/TDS Tester - HI98129

Regular price $241.95 CAD
$241.95 CAD
API Ammonia Test Strips

API Ammonia Test Strips

Regular price $22.30 CAD
$22.30 CAD
Hanna Salinity Calibration Solution

Hanna Salinity Calibration Solution - 25 Pack

Regular price $59.95 CAD
$59.95 CAD
Salifert Silicate Test Kit

Salifert Silicate Test Kit

Regular price $20.95 CAD
$20.95 CAD
Neptune Flow Sensor - 1 Inch

Neptune Flow Sensor - 1 Inch

Regular price $129.99 CAD
$129.99 CAD
Red Sea Calcium Pro Test Kit

Red Sea Calcium Pro Test Kit

Regular price $65.99 CAD
$65.99 CAD
MarinLab ICP-OES Aquarium & RO Water Test

MarinLab ICP-OES Aquarium & RO Water Test

4.0 out of 5 stars, 2 reviews
Regular price $89.95 CAD
$89.95 CAD
Hanna HI-93701-01 Free Chlorine Reagents - 100 Tests packaging

Hanna Free Chlorine Checker Reagents - 100 Pack

Regular price $62.95 CAD
$62.95 CAD
hanna marine ammonia checker for aquariums and aquaculture

Hanna Ammonia Checker - Marine

5.0 out of 5 stars, 1 review
Regular price $87.95 CAD
$87.95 CAD
Salifert Iodide Test Kit

Salifert Iodide Test Kit

Regular price $37.95 CAD
$37.95 CAD
Neptune 1LINK Cable - 10 Foot Male/Male

Neptune 1LINK Cable - 10 Foot Male/Male

Regular price $49.99 CAD
$49.99 CAD
Neptune Trident Service Kit

Neptune Trident Service Kit

Regular price $134.95 CAD
$134.95 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.