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Old 07-10-2005, 11:11 PM   #1
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Daytime lighting hours

In my newly setup and cycled 75 gal reef I have a 260 watt pc lighting system. I have a lot of brow algae frowing on my substrate and tank walls. I usually leave the lights on for 12 hrs in the day and off for 12 hrs in the night. Is this too much lighting? is this why i have so much algae?


My tanks-
newly set up 75 gal SW, 30 lbs of fiji lr, 30lbs of lace rock, 90 lbs of course/fine argonite sand, rena canister filter, 48" 4x65 watt pc, red sea turbo berlin skimmer.
Inhabitants- 2 percula clown fish, 1 muchroom coral, 2 leather corals, and 2 mystery corals.
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Old 07-10-2005, 11:14 PM   #2
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the brown algae is probably diatoms and is typical in new tanks. I leave my lights on 10-12hrs a day. 10 hours with both daylight and actinic and two hours (one hour morning and night) of actinic alone. So, no I don't think it's to much light. Get a clean up crew for the diatoms and give them some time to burn themselves out.

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Old 07-13-2005, 04:00 AM   #3
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Cindy would you say that's enough light in a 75gal for LR, esp. for coraline algae on LR? I am looking to get the same lighting for my 75 gal...
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light, lighting

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