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Old 01/06/2008, 04:16 PM
norwall norwall is offline
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Join Date: Dec 2006
Location: ingleside,il
Posts: 49
One HQI pendant on for 8 hours, the other on for 8 hours, at 4 hours apart for a total photoperiod of 12 hours. There is more to red slime algae than lighting though. Red slime is actually a bacteria and feeds on nutrients, mainly nitrates. I have had issues with this as well and one thing I do know is it can be tough to get rid of!