[APD] Tank Depth Vs. Light Levels for Glossostigma

["Lorenzo Rota" <lorenzo1961 at hotmail_com>]

Ive had problems with growth of Glossostigma and have been wondering if its 
due to light levels.  I'm using 4x55w CF lighting(6700K, 3 month old  bulbs) 
on an All-Glass 72 gallon bowfront.  Distance from water surface to level of 
Glossostigma/flourite substrate is about 19-20 inches(add another 4 inches 
for distance from water surface to lamps).   Basically, had slow or near 
zero growth, spindly appearance despite all other plants in tank doing very 
well.  Using typical Seachem Fluorish products( iron, potassium, nitrogen, 
flourite, flourish) so I know nutrients are in good ranges.   Is a tank with 
this height a problem as far as light penetration for foreground plants such 
as Glosso?  Any recommendations on maximum tank heights for planted 
aquariums?  Thanks for anyone's help on this.

Lorenzo Rota
Santa Cruz, CA

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