Neptune Systems Leak Detection Kit is an all in one leak sensor system for Apex Controllers. Each kit comes with two sensors and the FMM module allowing you to hook the LDK right up to any Apex and be functional. Just place your sensors in the most common areas where water may end up if there is a leak. These locations include behind your tank, sump, plumbing connections, any external equipment, etc. Then through programming your Apex you can have pumps shut off, alarms notify you, or anything else you may need to happen if a leak is detected. The included FMM module can handle up to 4 sensors allowing you to add 2 more LD-1 or LD-2 sensors. If you want complete control of your aquarium, make sure to check out Neptune Systems selection of Apex Controllers. They can handle simple tasks from turning your lights on and off, controlling heaters, to more complicated functions like turning on cabinet lighting when you open the door, send you emails or text messages when parameters are out of normal, or almost anything else you could imagine! Programming is easy through Apex Fusion, which is a cloud-based software that you can access from anywhere in the world! *Legal Stuff* The purpose and content of this video is to provide general information regarding the products and their applications as presented in the video. Aquatic sales solutions, inc. And its officers, directors, employees and agents disclaim all express or implied warranties, in any way, related to the products and their application as presented in this video, make no representation or warranty regarding the products and the application as presented in this video and shall not be liable for any direct or indirect losses or damages of any type, including but not limited to punitive damages, or from personal injury or death resulting from or in any manner related to the video, and the products in and contents of the video. The viewer expressly agrees that aquatic sales solutions, inc. And its officers, directors, employees and agents shall not be liable for any damages or losses related to the products in and content of the video and hereby agrees to hold the foregoing harmless from any such losses or damages.