High-tech, for a reliable water level in the aquarium Water level regulator with two sensors suitable for use in cabinet filters, in Comline filters or directly on the edge of the aquarium.  Scope of delivery: Ready for mounting with power...

With huge features jammed in a tiny package, the Duetto 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...

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...

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...

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.

An Auto Top Off (ATO) system is notably one of the most important pieces of equipment for a saltwater aquarium and simply a must have for any reef keeper. The IceCap ATO monitors and replenishes evaporated water eliminating the daily task of adding...

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. as an ATO in use with Chemical Dosing as a Refugium Features: Dimensions - 5" x...

Tired of lifting heavy buckets to refill sumps or tanks due to evaporation? There is finally a professional grade product that automates refilling evaporated water. The All-New A.T.O (Automatic Top Off) device is the most advanced water level controller...

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. as an ATO in use with Chemical Dosing as a Refugium Features: Dimensions - 10" x...

The A.T.O. is equipped with (2) float sensors that activate within seconds when your water level drops and automatically refills your sump or tank until it reaches your desired set point. Each float sensor has been designed with an exterior guard...

There is no need to worry about water evaporation anymore with the new ATO units. The sharp and clean unit comes with a shut-off valve attached and can easily be used with our Float Valve to help maintain water level in sumps. The ATO Reservoir Tank...

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...

Smart Level is the new versatile fully electronic water level controller designed by Hydor. Smart Level safely and easily handles the aquarium and sump water level due to evaporation. Designed to be used in the many different conditions that exist in the...

With 2 X dual-optical sensors, the Ultimate ATO is the first ATO to include 4 sensors. The 4 sensors allow us to design a dual-stage overfill alarm that is less intrusive as well as a run-dry protection feature that prevents your sump from running dry:...

The JBJ Nano ATO is the perfect upgrade for your aquarium. Our most reliable auto-top-off system is reimagined with dual optical level-sensors for ultimate precision. Enjoy the compact versatility of a digital sensor without compromising the security...

The Flexi is super versatile and great for aquariums up to 50 gallons. With an efficient DC pump, the Flexi can operate in both down flow and up flow modes. In down flow mode, it is an effective surface skimmer that helps to rid your aquarium of the oily...

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)...