NEPTUNE SYSTEMS APEX FMM OPTICAL LEVEL SENSOR V2 (OS-1) Hanna Instruments And unlike many wimpy pumps

And unlike many wimpy pumps out there

but it gets much closer than almost any LED available today

RUBY red wall to block light and prevent unwanted algae growth in skimmer section

per gallon in a 24 hour period

Meets corals’ complete nutritional requirements

NEPTUNE SYSTEMS APEX FMM OPTICAL LEVEL SENSOR V2 (OS-1) Hanna Instruments And unlike many wimpy pumpsOptical Level Sensor (OS 1) This sensor plugs into your FMM and, using reflected infrared light, will signal your Apex when it changes state from being wet to dry or dry to wet. This sensor can be used for constructing your own ATO (auto top off), as a high level warning sensor in your sump, water storage level sensor, and much more. The sensors can be mounted into custom brackets or through a hole in a vessel. Included are a fastening nut and