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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 ORP Probe

Neptune ORP Probe

Regular price $199.99 CAD
$199.99 CAD
Neptune FMM 24VDC 36W Power Supply

Neptune FMM 24VDC 36W Power Supply

Regular price $79.99 CAD
$79.99 CAD
Pinpoint ORP Probe Replacement

Pinpoint ORP Probe Replacement

$123.36 CAD
Sale price $123.36 CAD Regular price $137.60 CAD
Hydros Command Bus Terminator

Hydros Command Bus Terminator

Regular price $10.95 CAD
$10.95 CAD
Red Sea Trace Colors Pro Test Kit

Red Sea Trace Colors Pro Test Kit

5.0 out of 5 stars, 1 review
Regular price $130.99 CAD
$130.99 CAD
Hydros Triple Optical Level Sensor

Hydros Triple Optical Level Sensor

Regular price $68.85 CAD
$68.85 CAD
Salinity Refractometer Replacement Hinge

Salinity Refractometer Replacement Hinge

5.0 out of 5 stars, 1 review
$5.99 CAD
Sale price $5.99 CAD Regular price $8.55 CAD
Coralvue Controllers & Monitors

Hydros DC Micro Pump

Regular price $42.65 CAD
$42.65 CAD
Neptune DC24 to Bare Wire Cable - 10 Foot

Neptune DC24 to Bare Wire Cable - 10 Foot

$38.59 CAD
Sale price $38.59 CAD Regular price $47.99 CAD
Hanna Marine Multiparamater Photometer

Hanna Marine Multiparameter Photometer

Regular price $639.95 CAD
$639.95 CAD
Hydros 0-10v Quad Wave Engine Pump Adapter

Hydros 0-10v Quad Wave Engine Pump Adapter

Regular price $22.15 CAD
$22.15 CAD
Hydros Skimmer Sensor

Hydros Skimmer Sensor

Regular price $68.85 CAD
$68.85 CAD
Hanna Alkalinity Checker Freshwater Reagents - 25 Pack

Hanna Alkalinity Checker Freshwater Reagents - 25 Pack

Regular price $17.95 CAD
$17.95 CAD
Red Sea Algae Control Multi Test Kit

Red Sea Algae Control Multi Test Kit

Regular price $115.99 CAD
$115.99 CAD
HYDROS Control XP8 Energy Bar

HYDROS Control XP8 Energy Bar

Regular price $493.65 CAD
$493.65 CAD
AutoAqua Smart Doser 2

AutoAqua Smart Doser 2

Regular price $230.05 CAD
$230.05 CAD
Hydros Temperature Sensor

Hydros Temperature Sensor

Regular price $42.65 CAD
$42.65 CAD
Neptune Flow Sensor - 1/4 Inch

Neptune Flow Sensor - 1/4 Inch

Regular price $47.99 CAD
$47.99 CAD
Reef Crest Salinity Refractometer
new

Reef Crest Salinity Refractometer

Regular price $78.30 CAD
$78.30 CAD
Neptune Trident NP Testing System with 2 month Reagent Kit

Neptune Trident NP Testing System with 2 month Reagent Kit

Regular price $999.99 CAD
$999.99 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.