Wonderful light used on my 5.5 gallon low tech low light tank. It has not yet caused any hair, black brushes or other algae in the 7-hour recording time. The gap on the clip on the light needs to be increased by about 1/2" to accommodate the tank with the rim, but it still works, just not as securely as I would like. The neck is relatively stiff and can bend the rim of my tank if I don't steady it with one hand while moving the light. I would buy it again for future nano aquariums.
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