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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

XP Aqua ATO Replacement DC Pump

ATO Accessory

XP Aqua ATO Replacement DC Pump

Regular price $46.65
Sale price $46.65 Regular price
XP Aqua Duetto 2 Replacement Controller

ATO Accessory

XP Aqua Duetto 2 Replacement Controller

Regular price $140.00
Sale price $140.00 Regular price
XP Aqua Duetto2 ATO System

Auto Top Off

XP Aqua Duetto2 ATO System

Regular price $219.95
Sale price $219.95 Regular price
XP Aqua Flexi Reversible DC Pump

ATO Accessory

XP Aqua Flexi Reversible DC Pump

Regular price $39.65
Sale price $39.65 Regular price $46.65
XP Aqua Sumpless ATO2

Auto Top Off

XP Aqua Sumpless ATO2

Regular price $259.95
Sale price $259.95 Regular price
XP Aqua Ultimate ATO - Complete 4-Sensor ATO System

XP Aqua Ultimate ATO - Complete 4-Sensor ATO System

Regular price $221.30
Sale price $221.30 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.