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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 Flow Sensor - 2 Inch

Neptune Flow Sensor - 2 Inch

$152.55 CAD
Sale price $152.55 CAD Regular price $214.99 CAD
Hydros Minnow

Hydros Minnow

5.0 out of 5 stars, 1 review
Regular price $409.95 CAD
$409.95 CAD
Hydros Control X2

Hydros Control X2

Regular price $282.10 CAD
$282.10 CAD
Hydros Control X10

Hydros Control X10

Regular price $1,312.05 CAD
$1,312.05 CAD
Hydros Wave Maxspect 330/350 Gyre Engine Pump Adapter

Hydros Wave Maxspect 330/350 Gyre Engine Pump Adapter

Regular price $20.50 CAD
$20.50 CAD
Hydros Rope Leak Sensor Extension

Hydros Rope Leak Sensor Extension

Regular price $55.85 CAD
$55.85 CAD
Aqueon Ammonia Test Strips - 50 Pack

Aqueon Ammonia Test Strips - 50 Pack

Regular price $21.50 CAD
$21.50 CAD
Hydros Flow Sensor - 3/4 Inch

Hydros Flow Sensor - 3/4 Inch

$85.11 CAD
Sale price $85.11 CAD Regular price $101.65 CAD
Hydros Sole

Hydros Sole

Regular price $491.95 CAD
$491.95 CAD
Hydros Flow Sensor - 1 Inch

Hydros Flow Sensor - 1 Inch

Regular price $106.60 CAD
$106.60 CAD
Red Sea Alkalinity Pro Test Kit

Red Sea Alkalinity Pro Test Kit

$48.00 CAD
Sale price $48.00 CAD Regular price $65.99 CAD
HYDROS Start Aquarium Controller

Hydros Start

Regular price $491.95 CAD
$491.95 CAD
Hanna Copper Low Range Checker

Hanna Copper Low Range Checker

Regular price $77.95 CAD
$77.95 CAD
Half U Clips for Rope Leak

Half U Clips for Rope Leak - 10 Pack

Regular price $8.20 CAD
$8.20 CAD
Hydros Wave Maxspect 150/250/280 Gyre Engine Pump Adapter

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

Regular price $20.50 CAD
$20.50 CAD
Hydros Force Port 24v Adapter Cable

Hydros Force Port 24v Adapter Cable

5.0 out of 5 stars, 1 review
Regular price $25.40 CAD
$25.40 CAD
Hydros Control X3

Hydros Control X3

$277.76 CAD
Sale price $277.76 CAD Regular price $352.60 CAD
Hydros Control XS

Hydros Control XS

Regular price $282.10 CAD
$282.10 CAD
Hydros CO2 Solenoid Valve

Hydros CO2 Solenoid Valve

$40.69 CAD
Sale price $40.69 CAD Regular price $51.65 CAD
Vivid Creative Apex Display Mount - Black

Vivid Creative Apex Display Mount - Black

Regular price $14.20 CAD
$14.20 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.