I run a 36" 8-bulb HO T5 fixture and have kept Croceas successfully. My tank is 20" deep, but the clam is approximately 14-16" away from the light.
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~Drew
10G Nano * 10G Sump * Deltec MCE 600 Skimmer * JBL Viper 150w MH * Zeovit * Vortech MP40W
Millions long for immortality who do not know what to do with themselves on a rainy Sunday afternoon. ~S. Ertz
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