Innovative Marine Adds HydroFill Auto Top Off to Their Ever Growing Auqa Gadget Line


IM Hydrofill

The guys at Innovative Marine are just determined to give their aquarium line as much horsepower as possible, especially as they continue to flesh out their Auqa Gadget lineup. Their newest addition to the ever growing array of aquarium accessories is the HydroFill auto top off controller system. Currently, the aquarium marketplace does have several auto top off setups, but very few of them are designed to service smaller aquariums. Fortunately, the tiny form factor of the IM HydroFill hardware makes them ideal for systems of all sizes.

IM Hydrofill ATO Controller System

The HydroFill ATO Controller System operates similarly to other top off systems currently on the market, but does it much better and safer. Instead of using two float switches to tell the pump when to turn on and off, it uses two conductivity switches that are completely devoid of moving parts. These switches aren’t affected by wandering snails or a piece of floating debris, making them a much safer piece of equipment that won’t cause the pump to overflow your aquarium.

IM Hydrofill ATO Pump System

The use of two switches in the HydroFill system allows hobbyists to set their own “maximum” and “minimum” water level in their sump or refugium, and their positioning is made super easy with neodymium magnet mounts. So, no more drilling holes for float switches, using suction cups, or ugly brackets. And not to mention, the sensors have a tiny profile, which means they can go all those places that float switches can’t. As an added safety feature, each sensor sports two chemically inert graphite electrodes for redundancy and consistent long-term performance.

In addition to the controller and conductivity switches, the HydroFill ATO Pump System comes complete with a lift pump, acrylic bracket, return pipe, 10 feet of silicone tubing, three hose clamps, and an optional hanging mount. The pump is an external positive displacement diaphragm pump with a total output up to 15 gallons per hour and max 5 feet of head. It is self-priming and even has a built-in check valve to prevent back siphoning, which would prevent a pump failure from draining all that water back into the top off container and possibly overflowing it.

IM Hydrofill ATO Controller

IM Hydrofill Bracket with Pump

IM Hydrofill Acyrlic Bracket



  • 2 Year Warranty
  • Conductivity Method
  • For use in Fresh & Marine Applications
  • Controller Dims: 3.35” x 1.18” x 5.12”
  • Includes Double Sided Adhesive
  • 1000W, 8Amp/120V Pump Capacity
  • Power Consumption: 1 Watt
  • Visual LED indicators
    a. Power -Red
    b. Level – Green
    c. Low Level – Green
    d. Water Filling – Pulsing Green


  • Small Form Factor: 0.91” x 1.06” x 2.64”
  • (2) Sensor Design
  • Safe 5V Low Voltage
  • 6 foot sensor cables
  • (2) Rare Earth Neodymium Magnetic Sensor Holders
  • Chemically Inert Graphite Electrodes


  • Positive Displacement
  • Diaphragm Pump Method
  • Self-Priming
  • Built-in Check valve
  • Dry Run Protection
  • Thermally Protected
  • Low Voltage
  • ¼” Barb Fitting
  • Up to 15 Gallons per Hour
  • Pump mounting bracket

Return Kit:

  • 10 feet of silicone tubing
  • (3) ratchet clamps
  • Acrylic mounting bracket
  • Return pipe
  • Inlet Hose Strainer

And finally, a video!


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