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Collection: Dosing & Auto Top Off

Hands-off reef maintenance: auto top-off systems, dosing pumps, reservoirs, and auto water changers that hold salinity and chemistry steady. Evaporation shifts salinity daily; automation is what stops it drifting.

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86 products

Neptune Apex PMUP with PSU - Version 2

ATO Accessory

Neptune Apex PMUP with PSU - Version 2

Regular price $110.85
Sale price $110.85 Regular price $120.49
Neptune ATK Auto Top-Off Kit - Version 2

Auto Top Off

Neptune ATK Auto Top-Off Kit - Version 2

Regular price $373.51
Sale price $373.51 Regular price $405.99
Neptune DDR DOS Dual Reservoir

Dosing Reservoir

Neptune DDR DOS Dual Reservoir

Regular price $346.83
Sale price $346.83 Regular price $376.99
Neptune DOS DDR Tubing - 16 Meter

Dosing Accessory

Neptune DOS DDR Tubing - 16 Meter

Regular price $35.87
Sale price $35.87 Regular price $38.99
Neptune DOS DDR Tubing - 4 Meter

Dosing Accessory

Neptune DOS DDR Tubing - 4 Meter

Regular price $14.07
Sale price $14.07 Regular price $15.29
Neptune Liquid Level Sensor (LLS) 15 Inch. For all Apex aquarium controllers.

Auto Top Off

Neptune Liquid Level Sensor - 15 Inch

Regular price $113.61
Sale price $113.61 Regular price $123.49
Neptune Liquid Level Sensor (LLS) 23 Inch. For all Apex aquarium controllers.

Auto Top Off

Neptune Liquid Level Sensor - 23 Inch

Regular price $140.29
Sale price $140.29 Regular price $152.49
Neptune Liquid Level Sensor (LLS) 35 Inch. For all Apex aquarium controllers.

Auto Top Off

Neptune Liquid Level Sensor - 35 Inch

Regular price $180.13
Sale price $180.13 Regular price $195.79
Neptune Liquid Level Sensor (LLS) 4 Inch. For all Apex aquarium controllers.

Auto Top Off

Neptune Liquid Level Sensor - 4 Inch

Regular price $84.17
Sale price $84.17 Regular price $91.49
Magnetic Optical Sensor (MOS) from Neptune Systems. For the Apex and Apex Junior controllers.

Aquarium Monitor

Neptune Magnetic Optical Sensor

Regular price $86.93
Sale price $86.93 Regular price $94.49
Neptune LD3 Optical Leak detection accessory for all Apex aquarium controllers.

Aquarium Safety Equipment

Neptune Optical Multi-Surface Leak Sensor

Regular price $86.93
Sale price $86.93 Regular price $94.49
Neptune Replacement DOS Head Cap

Dosing Accessory

Neptune Replacement DOS Head Cap

Regular price $70.74
Sale price $70.74 Regular price $76.89
Red Sea Reef ATO+ Upgrade Kit

Auto Top Off

Red Sea Reef ATO+ Reefer Upgrade Kit

Regular price $329.99
Sale price $329.99 Regular price
Red Sea Reef ATO+ System

Auto Top Off

Red Sea Reef ATO+ System

Regular price $369.99
Sale price $369.99 Regular price
Red Sea ReefDose 2

Dosing Pump

Red Sea ReefDose 2

Regular price $499.99
Sale price $499.99 Regular price
Red Sea ReefDose 4

Dosing Pump

Red Sea ReefDose 4

Regular price $774.99
Sale price $774.99 Regular price
Red Sea ReefDose 4 Tube Holder

Dosing Accessory

Red Sea ReefDose 4 Tube Holder

Regular price $34.99
Sale price $34.99 Regular price
Red Sea ReefDose Accessory Kit - Blue/Green

Dosing Accessory

Red Sea ReefDose Accessory Kit - Blue/Green

Regular price $64.99
Sale price $64.99 Regular price
Red Sea ReefDose Accessory Kit - Red/Yellow

Dosing Accessory

Red Sea ReefDose Accessory Kit - Red/Yellow

Regular price $64.99
Sale price $64.99 Regular price
Red Sea ReefDose Blue/Green Tubes

Dosing Accessory

Red Sea ReefDose Blue/Green Tubes (4 x 3m)

Regular price $31.99
Sale price $31.99 Regular price

Consistency Is What Corals Reward

Reef inhabitants respond to stability more than anything else, and two things quietly destabilize a tank between your check-ins: evaporation pushing salinity up, and corals drawing down calcium, alkalinity, and magnesium. Automating both keeps the numbers flat instead of drifting.

The Building Blocks

  • Auto top-off — a sensor and pump that replace evaporated water the moment the level drops.
  • Dosing pumps — programmable peristaltic pumps that add precise supplement doses around the clock.
  • Reservoirs — dedicated containers that hold top-off water and dosing solutions.
  • Automatic water changers — units that remove old water and add new on a set interval.
  • Tubing and accessories — small-bore tube, organizers, and anti-siphon protection.

Start with an auto top-off — it prevents the salinity creep that does the most damage while you're away — then add dosing once testing shows what your corals consume. Match reservoir size to how long you want to go between refills. Questions on a setup? 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.