Model QMSS-E Quantum PAR Meter
A PAR meter to measure the amount
of useful light over a reef tank
is not mandatory for the proper
maintenance of a reef aquarium, but does give
insight as to the amount of light
your corals and other light
are receiving. Some corals do better
at lower light levels than others
- being able to actually measure the
incident light, at a particular
spot in the tank, can often help with
placement of the corals.
In addition, when metal halide
bulbs start to reach the end of
their useful lifetime, their PAR
value tends to drop. A PAR meter
can recognize that drop and give
an indication that it's time to
start thinking about switching out the old lamps for new.
Quantum Meters measure (PPF) Photosynthetic Photon Flux as opposed to PAR (Photosynthetically Active Radiation) but, for our purposes the two are
This model doesn't come with a detachable
probe cable. I contacted Apogee
to see if they would alter the
meter for me as I knew they had
done that, in the past, but they
advised "we no longer provide
that service". Hmmm...
It's easy to make a probe holder for the Apogee.
All you need is a couple pieces of 1/2" inch PVC pipe,
a three cable ties, and a few minutes work,it's all done.