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[APD] Re: UV Sterilizer
ill effects from using it for weeks at a time. Some people have it hooked
in-line and leave the light unplugged until it is needed, others run it
Running the UV unit inline with water circulation but WITHOUT the UV part
running is probably a bit of a problem. Normally nothing grows in the UV
compartment due to the UV, but without the UV running you will build up
gunk that will reduce the effectiveness of the UV unit when you are running it.
BTW, for all the debate about UV filters and wattages: It is the *contact
time* at a given intensity level that kills stuff. For lower wattage units
just use lower flow rates, for higher wattage units you can use higher flow
rates. Using a high-wattage unit at a low flow rate will kill more of more
resistant critters than a high flow rate on the same unit for example. I
suppose that in really murky water a higher-wattage unit would also work
faster to clear a tank since the higher intensity UV light would penetrate
further into the water in the unit's contact chamber and thus kill more of
the nasty critters on each "pass".
For occasional use one of the little 9-13 watt units with a small powerhead
should be pretty effective.
UNIX Systems Administrator
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