Photo period?

[tagraham]

Ok I have 6x39 watt t-5 fixture over a 29 with sps approx 7" below surface. Need to know a good photo period I know I'm on to long now. Blues 8am to 10pm and full 11 am to 8pm. Please be nice

 

[cichlid9]

I'm runnin 4x24 t5 over my standard 20 gallon sps tank. I think i have mine set at 8 hours for blues and 6 hours full. What kind of corals are you keeping? Maybe just slowly decrease it and monitor your colors of your corals. Might as well try to extend the life of your bulbs. It also probably depends on what type of bulbs your running. I have two blue plus, an aqua blue and i think a 10k bulb.

 

[tagraham]

3 blue+. 2 aquablue specials and a purple+. I just have 2 acro frags a monti denne and a rose milli. The rose is starting to bleach a little and my perameters are right on the money. My plum crazy and blue stag horn. Are doing fine so far.
Light is about 4" off the top