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Garry Burrell
12/19/2008, 02:47 PM
i am going to set up a 90 gal reef. i have 4 54watt t5s all are the o3 i also have 2 175 watt M/H bulbs . how long would you leave the lights on. i have mostly softes going in ,but also have 4 moint or caps also and 3 lps. please help thanks

areze
12/19/2008, 02:56 PM
~10-11 hours or as needed. whatever the balance is between electric bill and algea growth, cut back as needed.

Id stagger it, kick on the T5s first, then the MHs 30min later(and reverse on the way off). have the MH run for 10 hours, and the T5s for 11 hours.

ravedood
12/19/2008, 03:04 PM
I wouldn't even use the MH lamps if its going to be a softy tank. Take my case. I have a 55g tank with 2/48" VHO daylight lamps on an IceCap 660 with 2/65watt PC actinic. I have mostly softies, zoos, LPS and about 4 Monti caps.

I would only use the MH lamps if you are going to have SPS.