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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 24V Power Supply

Neptune 24V Power Supply

Regular price $47.99 CAD
$47.99 CAD
Neptune Systems Apex Power Supply

Neptune Apex Power Supply

Regular price $39.99 CAD
$39.99 CAD
Hydros DC Solenoid Water Valve

Hydros DC Solenoid Water Valve

Regular price $42.65 CAD
$42.65 CAD
Neptune AquaBus Cable - 3 Foot Male/Male

Neptune AquaBus Cable - 3 Foot Male/Male

Regular price $31.99 CAD
$31.99 CAD
Tropic Marin High-Precision Hydrometer
new

Tropic Marin High-Precision Hydrometer

5.0 out of 5 stars, 1 review
Regular price $50.65 CAD
$50.65 CAD
Hydros Salinity Kit

Hydros Salinity Kit

Regular price $204.95 CAD
$204.95 CAD
Hydros Drive Port Extension Cable - 9 Foot

Hydros Drive Port Extension Cable - 9 Foot

Regular price $21.35 CAD
$21.35 CAD
Neptune Apex Probe Module 2

Neptune Apex Probe Module 2

Regular price $184.99 CAD
$184.99 CAD
Red Sea Nitrate Pro Test Kit

Red Sea Nitrate Pro Test Kit

$61.86 CAD
Sale price $61.86 CAD Regular price $84.99 CAD
Hanna Ammonia Checker Reagent HI700-25

Hanna Ammonia Checker Reagent - Freshwater

5.0 out of 5 stars, 1 review
Regular price $17.95 CAD
$17.95 CAD
Hydros Wave Engine v2

Hydros Wave Engine v2

Regular price $528.10 CAD
$528.10 CAD
Neptune AquaBus Extension Cable - 15 Foot Female/Male

Neptune AquaBus Extension Cable - 15 Foot Female/Male

Regular price $64.99 CAD
$64.99 CAD
Neptune Flow Monitoring Kit (FMK)

Neptune Flow Monitoring Kit (FMK)

$327.45 CAD
Sale price $327.45 CAD Regular price $399.99 CAD
Hydros Control X4/XP8 Pro Pack

Hydros Control X4/XP8 Pro Pack

Regular price $1,164.45 CAD
$1,164.45 CAD
Zoo Med AquaSun Dual Aquarium Timer

Zoo Med AquaSun Dual Aquarium Timer

$22.26 CAD
Sale price $22.26 CAD Regular price $27.95 CAD
Hydros Sense Port Extension Cable - 9 Foot

Hydros Sense Port Extension Cable - 9 Foot

Regular price $21.35 CAD
$21.35 CAD
Neptune Apex 1Link Module

Neptune Apex 1Link Module

$257.17 CAD
Sale price $257.17 CAD Regular price $314.99 CAD
Neptune AquaBus Cable - 6 Foot Male/Male

Neptune AquaBus Cable - 6 Foot Male/Male

Regular price $39.99 CAD
$39.99 CAD
Hydros Launch

Hydros Launch

Regular price $902.05 CAD
$902.05 CAD
Hanna Phosphate Checker - High Range

Hanna Phosphate Checker - High Range

1.0 out of 5 stars, 1 review
Regular price $77.95 CAD
$77.95 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.