Drewpy said:Got a question for you t5 guru's...
Is this high enough and do these lights put out enough light for it? I read that bigger clams need more light...
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Drewpy, I've got a Squamosa that is footbal sized and a Maxima and a Crocea that are about 8" doing great under T5's. The Squamosa is on the bottom of a 24" deep tank under a center brace. When they get big they can get more of what they need from the lights. I wouldn't worry about phytoplankton on a large clam.