The scary thing most people is twofold when it comes to LED lighting first off is the cost a good set of lights will definitely hurt the pocketbook (including DIY lighting)and secondly having powerful enough LEDs to reach the bottom of deeper tanks and having the correct colour spectrum to promote growth and colour.
Once I save up the coinage I will be switching to LEDs on my big tank but that will be awhile in coming.
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 My aquarium is nothing but a smorgasbord for my cats.....
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