Neptune Systems Double Junction ORP Probe triggerfish It's perfect to use in

It's perfect to use in the Evolution Aqua Eazypod and Nexus filters

There is a black spot behind the head

but occasionally form large schools

CADE Frag Reef PR2-900F Black

as small marine fish can jump when startled

Neptune Systems Double Junction ORP Probe triggerfish It's perfect to use inNeptune Systems Apex Lab Grade Double Junction ORP ProbeNeptune Double Junction probes will out last most other traditional lab grade probes letting you go longer between calibrations, and having to purchase and replace probes less frequently. The Double Junction isolates the reference gel and probe from proteins and other organics that may otherwise precipitate and clog, shortening the lifespan of the probe. Longer lastingReliable readingsQuality