Re: NANFA-- 135 gal. Freshwater Tank

Bruce Stallsmith (
Tue, 03 Feb 2004 08:50:31 -0500

The actual pigments in freshwater macrophytes are more similar to
terrestrial plants than I had remembered, with a strong reaction peak in the
range 410--470 nm. There's still the problem of light of wavelength >~550 nm
penetrating water. Certainly visible red light is totally absorbed by water
within depths of at most half a meter so red is a moot point for aquatic
systems. Are actinics out and out strong enough in terms of either lumens,
or more exactly photon quanta? I honestly don't know. We shall see...

--Bruce Stallsmith
Huntsville, AL, US of A

>Bruce, wave length penetration is different in freshwater than marine due
>the pigments in freshwater. I think you are going to find that actinics are
>not very good for freshwater but I would really be interested in hearing
>how it
>turns out.
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