02-14-2008, 11:20 AM
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I would be leary to not give them any proper spectrum lighting at least a few hours a day. Like most living things, fish have needs for light to do some of their nutrient conversions just like we do. Too long without a proper spectrum of light could lead to a lot of the malodies we see from them that seem to go unexplained. Providng them with good cover and places to hide will let them get the amount of light they need and get out when they don't want to be in it.
When I had my bettas they would almost sunbath when I turned the lights on for 2-3 hours and then go and find a place to get out of the light.