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Collection: Dosing & Auto Top Off

Auto top-off systems, dosing pumps, reservoirs, and auto water changers to keep salinity and reef chemistry stable automatically. An auto top-off holds salinity steadier between water changes than any manual routine.

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86 products

Neptune Apex PMUP with PSU - Version 2

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

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

Neptune DDR DOS Dual Reservoir

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

Neptune DOS DDR Tubing - 16 Meter

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

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.

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.

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.

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.

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.

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.

Neptune Optical Multi-Surface Leak Sensor

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

Neptune Replacement DOS Head Cap

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

Red Sea Reef ATO+ Reefer Upgrade Kit

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

Red Sea Reef ATO+ System

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

Red Sea ReefDose 2

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

Red Sea ReefDose 4

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

Red Sea ReefDose 4 Tube Holder

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

Red Sea ReefDose Accessory Kit - Blue/Green

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

Red Sea ReefDose Accessory Kit - Red/Yellow

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

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

Regular price $31.99
Sale price $31.99 Regular price

Two Jobs, Both Automated

A reef tank loses fresh water to evaporation every day, which drives salinity up, and its corals steadily consume calcium, alkalinity, and magnesium. Auto top-off (ATO) handles the first by replacing evaporated water automatically; dosing pumps handle the second by delivering supplements on a set schedule. Together they take the two most tedious daily tasks off your hands. We carry gear from EcoTech, Bubble Magus, IceCap, Kamoer, and AutoAqua.

What You'll Find Here

  • ATO systems — sensor-controlled pumps that top off evaporated water and hold salinity steady.
  • Dosing pumps — single and multi-head peristaltic pumps for precise supplement dosing.
  • Reservoirs — top-off and dosing containers to feed both systems.
  • Auto water changers — automated systems that swap out old water for new.
  • Tubing & accessories — dosing tube, holders, and anti-siphon valves.

An ATO is the single best safeguard against a salinity swing while you're away. Pair a dosing pump with a good test routine so you're replacing exactly what your corals use. Email info@jlaquatics.com to match a system to your tank. J&L has equipped Canadian reefkeepers 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.