The AutoAqua Smart Skimmer Security is an essential safety device designed to prevent messy and potentially damaging protein skimmer overflows. Using a uniquely designed contactless optical sensor, this unit constantly monitors the waste level inside your skimmer's collection cup. If the level rises too high, the Smart Skimmer Security automatically cuts power to your skimmer pump, stopping the overflow before it starts and protecting your floors, equipment, and tank stability. Installation is incredibly simple thanks to its plug-and-play design and a magnetically coupled sensor that requires no DIY modifications to your existing collection cup lid. The powerful magnet works on cups up to 5/16 inch (8mm) thick. This reliable unit has no moving parts to fail or service and features a thoughtful auto time delay function that prevents false alarms and shutdowns during brief power outages, ensuring your skimmer resumes normal operation once power is stable. It can handle skimmer pumps up to 10 amps. This device is perfect for any reef aquarist who wants peace of mind and an automated safeguard against skimmer cup overflows. It is especially valuable for hobbyists who travel, work long hours, or are otherwise unable to check their tank frequently. By providing a reliable, set-and-forget solution, the Smart Skimmer Security allows you to run your skimmer with confidence, knowing your system is protected from one of the most common and frustrating aquarium mishaps.