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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 Oxyguard Probe with Cable

Neptune Oxyguard Probe with Cable

Regular price $1,277.99 CAD
$1,277.99 CAD
Seneye Part Pack

Seneye Part Pack

Regular price $21.00 CAD
$21.00 CAD
Nyos Alkalinity Test Kit
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Nyos Alkalinity Test Kit

Regular price $22.95 CAD
$22.95 CAD
Hydros System Command Bus Cable - 14 Foot

Hydros System Command Bus Cable - 14 Foot

Regular price $42.80 CAD
$42.80 CAD
Hanna Phosphorus Checker - High Range

Hanna Phosphorus Checker - High Range

$52.37 CAD
Sale price $52.37 CAD Regular price $77.95 CAD
Coralvue Controllers & Monitors

Hydros 3.5mm Adapter Cable

$15.68 CAD
Sale price $15.68 CAD Regular price $21.35 CAD
Hanna Magnesium Checker

Hanna Magnesium Checker - OPEN BOX

$59.39 CAD
Sale price $59.39 CAD Regular price $87.95 CAD
Red Sea ReefControl ATO Module
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Red Sea ReefControl ATO Module

Regular price $216.99 CAD
$216.99 CAD
Nyos Phosphate Test Kit
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Nyos Phosphate Test Kit

Regular price $43.95 CAD
$43.95 CAD
Nyos Nitrate Test Kit
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Nyos Nitrate Test Kit

Regular price $43.95 CAD
$43.95 CAD
Nyos Magnesium Test Kit everything included for testing
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Nyos Magnesium Test Kit

Regular price $34.95 CAD
$34.95 CAD
Coralvue Mini Aquarium Controller Board Leg Set

Coralvue Mini Aquarium Controller Board Leg Set

Regular price $69.95 CAD
$69.95 CAD
Seneye Controllers & Monitors

Seneye USB Power Adapter

Regular price $46.20 CAD
$46.20 CAD
Neptune 2 Channel Apex to Light Dimming Cable

Neptune 2 Channel Apex to Light Dimming Cable

Regular price $39.99 CAD
$39.99 CAD
Focustronic Reagent Full Set - Ca/ Mg/ PO4/ NO3/ KH
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Focustronic Reagent Full Set - Ca/ Mg/ PO4/ NO3/ KH

Regular price $249.95 CAD
$249.95 CAD
Focustronic Alkatronic CONC Reagent
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Focustronic Alkatronic CONC Reagent

Regular price $179.95 CAD
$179.95 CAD
Focustronic - Phosphate Reagent Kit
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Focustronic - Phosphate Reagent Kit

Regular price $72.95 CAD
$72.95 CAD
Focustronic - Alkalinity Reagent Kit
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Focustronic - Alkalinity Reagent Kit

Regular price $44.95 CAD
$44.95 CAD
Focustronic - Magnesium PRO Reagent Kit
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Focustronic - Magnesium PRO Reagent Kit

Regular price $49.95 CAD
$49.95 CAD
Focustronic - Calcium Reagent Kit
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Focustronic - Calcium Reagent Kit

Regular price $49.95 CAD
$49.95 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.