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#1
04-22-2010, 01:22 AM
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Photo period when switching to MH
Just received my new lights today and have them on my tank now. They are 48" MH 2x250W with moon lights. I had a 4x24W T5HO on it from my old 55gal while I was waiting. They are on a standard 90gal now. Just wondering how long I should have them on to start while my corals adjust, its a lot more intense light. My poor toad stool leather shrivelled up with in the first half hour.
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Jennifer Last edited by JenniferL; 04-22-2010 at 01:30 AM. 
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#2
04-22-2010, 01:46 AM
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tagging along.
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72 Gallon Bowfront Reef.. Hardware:2x250w Luminex Elite HQI Reflectors (Phoenix Hexarc Bulbs), Galaxy 2x250w Electronic ballast, Euroreef 130 Skimmer, Sedra KSP 7000 Retern... Live Stock: Pair of Hawaiian Flame Wrasse, Leopard Wrasse, Pink Streaked Wrasse, Pair True Percula Clowns, Potters Angel, African Flameback Angel, Orange Fin Tomini Tang, Yellow Assessor, Tailspot Blenny, Purple Firefish.. 45 G FW Asain Barb Community tank.
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#3
04-22-2010, 03:11 AM
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I would either go to Home Depot and buy some window screen material and put a few sheets over the tank to "shade" the light a bit. Then every week take a sheet off so that the light is getting more intense by the week.
Another option is to run your lights 1/2 hour on, one hour off, 1/2 hour on, one hour off and then gradually "meld" the photoperiod into one long photoperiod over the course of a few weeks. (This is how I did it when switching from 150 watt halides to 250 watts) It just takes more fooling around with the timer. I was too lazy to go buy screen material and rig it so that it would "sit" over the tank and under the lights. Hope this helps. Last edited by Dez; 04-22-2010 at 03:55 AM.
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#4
04-22-2010, 03:18 AM
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+1 Cut your hours back and increase slowly.
Watch for corals going lighter in color move them to the side or down a bit, and raise your lights if you can.
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150 Gal system 3'x3' 400W M/H, Bekett skimmer, Dart return,1/4 HP Chiller 180 Gal Drop tank, LED lights, Bubble master 250 skimmer,Hammerhead on a closed loop, Speed wave return.
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#5
04-22-2010, 04:03 AM
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Thanks for the replies. I think I will try starting at 4hrs/day and slowly increasing from there. I hope the heat won't be too much of an issue otherwise I may just sell this and go for a 48" T5HO light fixture. I do like the shimmer though
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Jennifer
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#6
04-22-2010, 04:23 AM
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Quote:
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Christy's Reef Blog My 180 Build Every electronic component is shipped with smoke stored deep inside.... only a real genius can find a way to set it free.
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