Charles wrote:
On Sun, 6 Mar 2005 03:45:08 GMT, (Richard Sexton)
wrote:
For my 2.5 G tanks I use 13W bulbs. Each tank gets half of an
AHSUPPLY 26 watt bright kit. I just build a new hood from rain gutter
parts, I like it so far.
Seven watter per gallon ought to work :-)
the watts per gallon does sound outrageous, but I don't see it as too
bright. In one tank some dwarf sagitaria does really well, in another
anubius grows about normally (slow), java moss survives, Echinodorus
tenellus barely lives and algae grows, but not too badly. There must
be a scale factor working here, but I don't understand it.
Agreed. I'm getting Rotala indica growing about 1/2" a day on the 2
gallon tank with 14 watts but that's about like 2 wpg on a larger tank.
Many years ago, when small CF bulbs were not available I tried a 4
watt CF fixture designed for closets. That's 2 wpg, yet I could barely
keep Anubias alive.
I suspect that there is a minimum number of lumens required for aquatic
plant growth. In smaller tanks, we need more than 2 wpg to reach the
magic number.
--
__ Elaine T __
__' http://eethomp.com/fish.html '__