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Collection: Probes & Accessories

Replacement probes, calibration solutions and probe mounts for aquarium controllers and monitors. Probes drift with age, so calibration fluid is a running cost.

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24 products

AutoAqua Smart Doser 2

Controller Accessory

AutoAqua Smart Doser 2

5.0 out of 5 stars, 2 reviews
Regular price $231.65
Sale price $231.65 Regular price
AutoAqua Smart Doser 4

Controller Accessory

AutoAqua Smart Doser 4

3.5 out of 5 stars, 2 reviews
Regular price $360.35
Sale price $360.35 Regular price
Neptune Conductivity Calibration Solution

Controller Accessory

Neptune Conductivity Calibration Solution - 53.0 mS

5.0 out of 5 stars, 1 review
Regular price $9.99
Sale price $9.99 Regular price
Neptune pH Probe

Controller Accessory

Neptune pH Probe

Regular price $184.99
Sale price $184.99 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
AutoAqua Smart Stir

Controller Accessory

AutoAqua Smart Stir

Regular price $54.05
Sale price $54.05 Regular price
Neptune ORP Probe

Controller Accessory

Neptune ORP Probe

Regular price $199.99
Sale price $199.99 Regular price
AvidAqua MPO Quattro Probe Organizer
new

Controller Accessory

AvidAqua MPO Quattro Probe Organizer

Regular price $67.60
Sale price $67.60 Regular price
AvidAqua MPO Duo Probe Organizer
new

Controller Accessory

AvidAqua MPO Duo Probe Organizer

Regular price $59.10
Sale price $59.10 Regular price
Neptune Apex Temperature Probe

Controller Accessory

Neptune Apex Temperature Probe

Regular price $79.99
Sale price $79.99 Regular price
Focustronic Reagent Full Set - Ca/ Mg/ PO4/ NO3/ KH
new

Controller Accessory

Focustronic Reagent Full Set - Ca/ Mg/ PO4/ NO3/ KH

Regular price $249.95
Sale price $249.95 Regular price
Focustronic Alkatronic CONC Reagent
new

Controller Accessory

Focustronic Alkatronic CONC Reagent

Regular price $179.95
Sale price $179.95 Regular price
Focustronic - Alkalinity Reagent Kit
new

Controller Accessory

Focustronic - Alkalinity Reagent Kit

Regular price $44.95
Sale price $44.95 Regular price
Focustronic - Calcium Reagent Kit
new

Controller Accessory

Focustronic - Calcium Reagent Kit

Regular price $49.95
Sale price $49.95 Regular price
Focustronic - Nitrate Reagent Kit
new

Controller Accessory

Focustronic - Nitrate Reagent Kit

Regular price $44.95
Sale price $44.95 Regular price
Focustronic - Magnesium PRO Reagent Kit
new

Controller Accessory

Focustronic - Magnesium PRO Reagent Kit

Regular price $49.95
Sale price $49.95 Regular price
Focustronic - Phosphate Reagent Kit
new

Controller Accessory

Focustronic - Phosphate Reagent Kit

Regular price $72.95
Sale price $72.95 Regular price
AvidAqua ModMag
new

Controller Accessory

AvidAqua ModMag Giga

Regular price $44.35
Sale price $44.35 Regular price
AvidAqua ModMag
new

Controller Accessory

AvidAqua ModMag Mega

Regular price $37.45
Sale price $37.45 Regular price

Your Readings Are Only as Good as the Probe

Probes wear out. A pH or ORP probe's reference junction ages whether or not the tank is doing well, and after a year or two the readings drift even though the controller reports them with the same confidence. Regular calibration is how you catch that — and calibration solution ages too, so replace it on schedule.

What's in This Collection

  • Replacement probes — pH, ORP, conductivity and temperature, with double-junction options built for saltwater.
  • Calibration solutions — pH and conductivity standards, plus a magnetic stirrer for repeatable results.
  • Probe mounts and organizers — magnetic racks and multi-probe holders that hold depth in the sump.
  • Displays and dosing units — compact controller displays and dosing pumps that integrate with a larger system.

Check that a probe matches your controller's connector before ordering, and keep spare calibration fluid on hand. Questions? 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.