[APD] Re:Re: Minimum Light Threshold..

["Robert H" <robertph3 at comcast_net>]

We mostly
> agree that 4 wpg on a larger tank is a lot of light.  But
> if you take a
> gallon of water and a 4 watt light you can't grow plants.
>  Why not?  You
> have 4 wpg.  True, but you have not met the MLT for the
> plants.  I see it
> all the time in my terrestrial garden.

Your example fails here and in the other forum because you seem to think the
watts per gallon rule applies to incadescent light bulbs. I presume you are
not talking about a four watt flourescent. A flourescent light is several
times more intense than an incadescent.  That is why a 13 watt screw in PC
takes the place of a 75 watt incadescent.  2 to 3 watts of flourescent light
per gallon of water over a ten gallon tank is more than enough to grow just
about anything.  A ten gallon tank is very shallow. Explain to me why a ten
gallon tank  would need more intensive light than a 20 gallon tall tank.
Please.

Robert Hudson
www.aquabotanic.com
90 day guarantee on plants!!

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