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RE: Aquatic Plants Digest V3 #417
>> Subject: Re: double fixtures
>> In a message dated 98-07-29 20:36:48 EDT,
Aquatic-Plants-Owner at actwin_com
>> for lighting, you suggested the 2 watts per gallon formula.
>> that a double-40 watt fixture is not enough for a 55 gallon
>> does one get a triple light fixture?>>
>> Sorry I never saw a triple myself either. But I use a
formula of gallons
>> times 24 = watt hours. Therefore for the 55 gallon you need
>> hours and dividing that by 80 watts you get 16.5 hours per
day. This is
>> only a rough number and needs to be adjusted down if you have
>> tubes like the chroma 50's or a few others.
>> f<<or 10 and 20 (or 29) gallons, the only fixtures available
are the single
>> 15 and 20 watt ones, respectively. what are the other
>> there double fixtures for such tank sizes? >>
>> I'm using doubles on my 29's and 30 gallon tanks. Thing is
>> 20 watt tubes only so were back to the formula. But even
with the formuula
>> I find that running 14 to 16 hours a day seems to be almost
ideal rather than
>> the 18 hours from the formula. 18 hours just gives to much
>> my desire.
I use two double light fixtures that gives me 80watts over the
works out to be ~3 watts to a gallon. These lights are run on a
12 hr period and have had no problem with algae.
You can get these double light fixtures from Home Depot. Then
make yourself a DIY hood to
accommodate both the fixtures and you should be set.