Neptune Systems LDK Leak Detection KitAdd leak detection to your Neptune Apex Controller Neptune's LDK (Leak Detection Kit) includes everything you will need to add leak sensors to your Apex Controller within minutes. Includes two leak sensors Compatible with all Apex models Powered through Aquabus connection Add up to four total leak sensors Detecting a leak early can be the difference between saving a tank to an entire loss. Neptune's Leak Detection Kit is the perfect solution for