T5's & clams

[Doug]

When looking after Mike,s old 120 with an 8 bulb fixture, I noticed the clams needed to be higher up to look good. Seemed to lack light on the bottom, which would have been about 30in. from the light hood.

Same in my 90g with a cheaper 6 bulb fixture. In both cases, clams like derasa & squamosa were fine on or near the bottom but not crocea or maxima,s