Auto Top Offs

With huge features jammed in a tiny package, the Duetto2 is the perfect ATO for your aquarium. XPAqua’s proprietary dual-optical sensor packs two precise level sensors in one incredibly small package. In addition to keeping your water level...

For small aquariums, a stable osmotic balance is important, because they are particularly sensitive to constantly changing salt concentrations. The Osmolator nano which was specifically designed for this, is a water level controller with only a...

The ATK (Automatic Top-off Kit) is a simple, standalone, and complete solution for replacing water lost to evaporation. The new aquarium hobbyist has many challenges, but none is more annoying than the chore of adding water, every day, to make up for...

Replacement dosing pump with low voltage 3-12V DC for osmolator.Power with 4mm hose at 11V: 0.9m – 110/h, 1.4m – 80l/h, 1.8m – 58l/h, Hmax 3.6m.

Why purchase a separate and expensive auto top-off system when HYDROS can do the job for you? The HYDROS Auto Top-Off Kit comes with everything you need to use your HYDROS device (like the Control X2 or Control X4) as...

The ReefATO+ sensor requires the electrical conductivity levels that are typical for seawater to work properly and therefore this system will not work for freshwater systems. The ReefATO+ is an exceptionally reliable auto top-off system that includes a...

Straightforward and safe water level controller for fresh and sea water with optical control sensor and independent thermal safety sensor. A constant water level keeps the salt concentration constant in seawater aquariums. Incl. Turbelle® High...

ATO - A feature rich, multi-purpose reservoir. Bashsea has packed the ATO full of versatile features so you can use it the way you want to use it. Now With a Port that fits the Neptune Systems Liquid Level Sensor Perfectly.  We recommend...

ATO - A feature rich, multi-purpose reservoir. Bashsea has packed the ATO full of versatile features so you can use it the way you want to use it. Now With a Port that fits the Neptune Systems Liquid Level Sensor Perfectly.  We recommend...

The Hydrofill Ti Reservoir is the next generation auto top off gadget that simplifies tasks involved for evaporated makeup water. The smart design offers 5 gallons of storage capacity and a mere (7.87” x 11.81”) footprint to easily place...

The TUNZE® Osmolator® 3 nano is a simple and safe device with just one sensor for maintaining a constant water level in aquarium systems up to approx. 250 liters (66 US gal.), can be placed in cabinet filter systems or directly on the...

The Turbelle® High Jet is a replacement dosing pump with safety extra low voltage 12 V DC for Osmolator® nano 3152 and Osmolator® 3155 and belongs to a new generation of centrifugal pumps with a high delivery height and small...

Say “Au Revoir” to your old reservoir. The Hydrofill Ti Reservoir is the next generation auto top off gadget that simplifies tasks involved for evaporated makeup water. The smart design offers 15 gallons of storage capacity and a mere (12...

This Kit was designed for current Reefer Owners.  It does not include the Magnetic ATO Sensor Mounting Bracket. The ReefATO+ is an exceptionally reliable auto top-off system that includes a highly accurate temperature monitor plus an...

HydroFill Ti – Universal ATO Return Bracket The Universal ATO Return Bracket is the fastest and simplest way to complete your ATO return system. Simply position and anchor to your aquarium. The cell cast acrylic body and custom made...

The Reef Breeders Prism-ATO  is designed to work with aquariums of all sizes, from pico desktops and All-in-One aquariums with limited space, to large reef tanks with full sumps. The Prism ATO has 3 sensors and registers your water level in a...

The Reef Breeders Exo-ATO (External ATO) is one of the first ATO systems to contain all electronics outside of your aquarium. The controller and sensor mount to the outside of the glass, and a small magnetic ring is inserted at your desired water level...

HydroFill Ti – ATO Controller Automate freshwater replenishment, and say farewell to heavy lifting, unstable water parameters, and the need to frequently watch your water line. Topping off evaporated water for our aquariums is a tedious but...

Fits: Red Sea ReefATO+

HydroFill Ti - ATO Return Pump Pair your auto top off with the industry's first low voltage air lift pump specifically designed for ATO controllers. Engineered for high performance, this external positive displacement diaphragm pump, outputs up to 15...

Dive into a new era of aquarium care with the ReefBreeders ATO 2023 Model, where sophistication harmonizes with advanced functionality! The ReefBreeders ATO symbolizes the zenith of aquarium care innovation. With enhanced features, aesthetics, and...

Sumpless ATO is the first and only ATO designed specifically for aquariums without sumps. The combination of the sleek overflow box and the innovative dual-optical sensor ATO will help to keep your aquarium topped off and your water crystal clear...

Red Sea's ATO fits perfectly on the rear compartment of the Desktop Aquarium range to maintain a consistent water level in the sump area. This allows for quiet and consistent operation of the pump and skimmer Features of the Desktop ATO by Red...

Replenish Evaporated Water... with Confidence! The IceCap ATO EZ System is an easy-to-use pump and sensor combo that offers peace of mind when replenishing evaporated water to an aquarium. Its twin optical sensors extend the device’s...

X2SR is a water change system that can remotely control it through the mobile phone App using WiFi. The automatic water replenishment function can be completed through the submersible pump interface. To mitigate possible overflow risks, X2SR comes...

The Smart ATO Nano Kit is a plug-and-play auto top-off system made by Autoaqua. Specifically designed for nano and pico aquariums under 50 gallons, this ATO nano kit will automatically monitor and refill evaporated...

Trigger Systems Titanium ATOs are one of the best looking ATOs on the market. They match perfectly to the Titanium line of sumps. These ATOs have built in LEDs along with a LED remote and a holder for the remote that can be installed on the left or...

Freshwater Reservoir For Storing Auto-Top-Off Water IceCap Freshwater Reservoirs are designed to hold a fixed amount of top-off water for your ATO system. The reservoir is fully enclosed to prevent dust and debris from entering and to minimize...

Innovative 2 in 1 Auto-Top-Off and Auto-Water-Change system achieves the aims of automatic tank maintenance. With precise and smooth DC Diaphragm pump, Smart AWC Lite is the ideal for any aquariums under 150 gallons.   INTEGRATE DESIGN ●...

Solenoid valve to use with gravity fed water containers or with most RODI units. Replaces the stock fill pump of the IceCap ATO.  Equipped with a 14.5ft cord for versatile and easy installation Hooks up with standard 1/4in ro tubing (not included)...

The Micro Aquarium Auto Top Off is designed to fit in the Micro Reef-Ready Tank sump, Small-In-One Aquarium, and just about every other tank sizing up to 40 gallons. An Auto Top Off will significantly boost your tank's stability by keep your salinity...

IceCap ATO Controller Only Genuine replacement sensor for the IceCap ATO. Comes with the sensor only. No other components are included.

Freshwater Reservoir For Storing Auto-Top-Off Water IceCap Freshwater Reservoirs are designed to hold a fixed amount of top-off water for your ATO system. The reservoir is fully enclosed to prevent dust and debris from entering and to minimize...

Features: Quality Hand Crafted Acrylic Front viewing window with water level indicator White walls preventing algae from lessening light penetration Model: H205 Dimensions: 5x15x16" Volume: 5 Gallons      

Fits: Red Sea ReefATO+

hygger Aquarium Auto Top-Off Kit is a device that monitors and automatically adds freshwater to an aquarium to replace the lost water that the aquarium evaporates. It safely keeps water and salinity levels (in marine aquariums) stable...

Premium Performance and Excellent Auto-Top-Off System The AutoAqua Smart ATO Lifter offers powerful performance and excellent auto-top-off functionality, with a silent AQUA Lifter Pump and a brand new ATO controller, ensuring accurate detection...

Trigger Systems Titanium ATOs are one of the best looking ATOs on the market. They match perfectly to the Titanium line of sumps. These ATOs have built in LEDs along with a LED remote and a holder for the remote that can be installed on the left or...

Features: Quality Hand Crafted Acrylic Front viewing window with water level indicator White walls preventing algae from lessening light penetration Model: H2012 Dimensions: 12x15x16" Volume: 12 Gallons      

Fits: Red Sea ReefATO+ REEF-SPEC Titanium Leak Detector for ReefATO+ Detects RO & Seawater 3m / 10' Cable