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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

AutoAqua Smart Stir

Controller Accessory

AutoAqua Smart Stir

Regular price $54.05
Sale price $54.05 Regular price
Hydros Dosing Pump

Aquarium Monitor

Hydros Dosing Pump

Regular price $103.30
Sale price $103.30 Regular price
Hanna Marine pH Checker

Test Kit

Hanna Marine pH Checker

5.0 out of 5 stars, 1 review
Regular price $77.95
Sale price $77.95 Regular price
Hydros Triple Optical ATO Kit

Aquarium Monitor

Hydros Triple Optical ATO Kit

Regular price $137.75
Sale price $137.75 Regular price
Salifert Freshwater Test Kit - Ammonia

Test Kit

Salifert Freshwater Test Kit - Ammonia

Regular price $13.45
Sale price $13.45 Regular price
Salifert Freshwater Test Kit - pH

Test Kit

Salifert Freshwater Test Kit - pH

5.0 out of 5 stars, 1 review
Regular price $9.45
Sale price $9.45 Regular price
MarinLab ICP-OES Aquarium Water Test

Test Kit

MarinLab ICP-OES Aquarium Water Test

Regular price $59.95
Sale price $59.95 Regular price
Neptune Apex Flow Monitoring Module (FMM)

Aquarium Monitor

Neptune Apex Flow Monitoring Module (FMM)

Regular price $229.99
Sale price $229.99 Regular price
Neptune ORP Probe

Controller Accessory

Neptune ORP Probe

Regular price $199.99
Sale price $199.99 Regular price
Seneye Reef Monitor for aquariums

Aquarium Monitor

Seneye Reef Monitor

5.0 out of 5 stars, 1 review
Regular price $315.00
Sale price $315.00 Regular price
Hanna Replacement Test Reagent Vial

Test Kit

Hanna Replacement Test Reagent Vial

4.0 out of 5 stars, 1 review
Regular price $12.95
Sale price $12.95 Regular price
Salinity Refractometer Replacement Hinge

Salinity Tester

Salinity Refractometer Replacement Hinge

5.0 out of 5 stars, 1 review
Regular price $5.99
Sale price $5.99 Regular price $8.65
API Calcium Test Kit

Test Kit

API Calcium Test Kit

Regular price $16.75
Sale price $16.75 Regular price
API High Range pH (Marine) Test Kit

Test Kit

API High Range pH (Marine) Test Kit

4.5 out of 5 stars, 2 reviews
Regular price $10.60
Sale price $10.60 Regular price
API Low Range pH (Freshwater) Test Kit

Test Kit

API Low Range pH (Freshwater) Test Kit

Regular price $9.70
Sale price $9.70 Regular price
Pinpoint ORP Storage Solution

Aquarium Monitor

Pinpoint ORP Storage Solution

Regular price $13.75
Sale price $13.75 Regular price
Neptune AquaBus Cable - 6 Foot Male/Male

Aquarium Monitor

Neptune AquaBus Cable - 6 Foot Male/Male

Regular price $39.99
Sale price $39.99 Regular price
Zoo Med AquaSun Aquarium Timer

Aquarium Timer

Zoo Med AquaSun Aquarium Timer

Regular price $21.10
Sale price $21.10 Regular price
Nyos Calcium Test Kit
new

Test Kit

Nyos Calcium Test Kit

Regular price $34.95
Sale price $34.95 Regular price
Nyos Magnesium Test Kit everything included for testing
new

Test Kit

Nyos Magnesium Test Kit

Regular price $34.95
Sale price $34.95 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.