RedSea ReefControl - ATO moduleReefControl ATO module ReefControl ATO Module The digital ATO sensor and dc pump of the ReefControl ATO module connect directly to the ReefControl Pro or Lite to seamlessly add a fully featured ATO to your system without the need for an additional controller. (Controller sold separately) 3m 10' Silicone Tubing Tube Holder Syphone Breaker 12v DC Pump Sensor Holder & Magnetic Corner Bracket ReefControl Digital ATO Level & Temperature Sensor ReefControl