Well, IMO, PCs work great over a Nano, they can be used in rows, or if it is a 5 gallon, then in succession. Like the following:
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[Light Light Light Light]
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or
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[Light Light]
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[Light Light]
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[Light Light]
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or even
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[Light]
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PS A Nano Forum sounds great! I'm still crossing my fingers for a FW Forum also.