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Collection: Controllers & Testing

Testing and monitoring gear for freshwater and reef tanks: reagent kits, digital checkers, meters, probes, and automated controllers. Manual kits confirm a number; controllers watch it around the clock.

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265 products

Salifert Freshwater Test Kit - Phosphate

Test Kit

Salifert Freshwater Test Kit - Phosphate

5.0 out of 5 stars, 1 review
Regular price $14.95
Sale price $14.95 Regular price
Salifert Freshwater Test Kit - Nitrite

Test Kit

Salifert Freshwater Test Kit - Nitrite

5.0 out of 5 stars, 1 review
Regular price $10.95
Sale price $10.95 Regular price
Hanna Salinity Calibration Solution

Test Kit

Hanna Salinity Calibration Solution - 25 Pack

Regular price $59.95
Sale price $59.95 Regular price
Neptune Apex 24VDC Solenoid Valve

Aquarium Monitor

Neptune Apex 24VDC Solenoid Valve

Regular price $79.99
Sale price $79.99 Regular price
Neptune Flow Sensor - 1/2 Inch

Aquarium Monitor

Neptune Flow Sensor - 1/2 Inch

Regular price $64.31
Sale price $64.31 Regular price $79.99
Neptune pH Probe

Controller Accessory

Neptune pH Probe

Regular price $184.99
Sale price $184.99 Regular price
Neptune 1LINK Cable - 10 Foot Male/Male

Aquarium Monitor

Neptune 1LINK Cable - 10 Foot Male/Male

Regular price $49.99
Sale price $49.99 Regular price
Salifert Potassium Test Kit

Test Kit

Salifert Potassium Test Kit

4.0 out of 5 stars, 1 review
Regular price $23.95
Sale price $23.95 Regular price
Neptune Magnetic Probe Rack

Controller Accessory

Neptune Magnetic Probe Rack

Regular price $99.99
Sale price $99.99 Regular price
Neptune Conductivity Probe

Controller Accessory

Neptune Conductivity Probe

Regular price $384.99
Sale price $384.99 Regular price
Neptune AquaBus Cable - 3 Foot Male/Male

Aquarium Monitor

Neptune AquaBus Cable - 3 Foot Male/Male

Regular price $31.99
Sale price $31.99 Regular price
Neptune Apex Probe Module 1

Aquarium Monitor

Neptune Apex Probe Module 1

Regular price $184.99
Sale price $184.99 Regular price
Two Little Fishies AccuraSea Seawater Calibration Solution - 250ml
new

Salinity Tester

Two Little Fishies AccuraSea Seawater Calibration Solution - 250ml

Regular price $15.00
Sale price $15.00 Regular price
Hanna HI-70300L Electrode Storage Solution - 500 mL

Test Kit

Hanna pH Electrode Storage Solution HI-70300L - 500ml

Regular price $31.95
Sale price $31.95 Regular price
Hanna Phosphate Checker High Range Reagents - 25 Pack

Test Kit

Hanna Phosphate Checker High Range Reagents - 25 Pack

5.0 out of 5 stars, 1 review
Regular price $17.95
Sale price $17.95 Regular price
Hydros Command Bus Terminator

Aquarium Monitor

Hydros Command Bus Terminator

Regular price $10.95
Sale price $10.95 Regular price
Hanna Ammonia Checker Reagent HI700-25

Test Kit

Hanna Ammonia Checker Reagent - Freshwater

5.0 out of 5 stars, 1 review
Regular price $17.95
Sale price $17.95 Regular price
hanna marine ammonia checker for aquariums and aquaculture

Test Kit

Hanna Ammonia Checker - Marine

5.0 out of 5 stars, 1 review
Regular price $87.95
Sale price $87.95 Regular price
Hydros 2ml/min Dosing Pump

Aquarium Monitor

Hydros 2ml/min Dosing Pump

Regular price $127.90
Sale price $127.90 Regular price
Coralvue Black Aquarium Controller Board

Aquarium Monitor

Coralvue Black Aquarium Controller Board

Regular price $209.95
Sale price $209.95 Regular price

You Can't Correct What You Haven't Measured

Stable water chemistry is the difference between a thriving tank and a stalled one. Testing tells you where you stand; monitors and controllers keep watch when you're not looking.

Levels of Testing and Control

  • Manual test kits — titration-based kits for periodic checks of the core parameters.
  • Digital checkers — handheld colorimeters that remove the guesswork of reading color charts.
  • Continuous monitors — pH, salinity, and temperature meters with calibration solutions.
  • Automation — controllers that log data and switch equipment on set conditions.

A simple community setup needs little more than a master kit. A demanding reef under active dosing earns its keep from digital checkers and a controller that reacts to a failure faster than you can. Choose the level that matches how much risk your livestock represents. Not sure which tier fits your tank? Email info@jlaquatics.com.

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.