Pretty much! I think there more like this after 10 min.The average LED user: "I don't know maybe I am turning the lights on too bright, should I go from 55% to 50%??"
The acros in Troylee's tank when he flicks on his metal halides every morning:
Yes! I do this with every coral that goes into my tank with MH/T5 hybrid and I’ve never lost one due to lighting. Lowest PAR in my tank at the sand bed is 150-200. 700+ at the top.
Ok well that’s probably the issue there… if I remember correctly from previous years, 1xr15 per 2 tank ft for softies and 1 xr30 per 2 ft for mixed reef and 1 xr30 per tank foot for wall to wall sps. So if you want to stick with xr15s you might want to add a few more units to keep acros. You can get away with only a couple of units but placement of the sticks will be key and difficult to get the punch you need in a tank that’s over 6.5 ft long and somewhat tall with just 3 xr15s. I run 4 XR30s in my2 yr old 4 ft long tank ( I know I could use 3 and be ok but the 4th fills in all the shadows and gaps) …. There are a lot of “lower” light sps you can keep like several montis and even some acros do well in lower par but generally for “acropora” you want to give them a solid 250 par minimum.
I run all channels and 100 except for greens are only at 10 and overall intensity is at 63%. Blues 1 hr before and after for ramp. But I do run 2 OR3 bars, with lenses removed to give a lot more spread…. Par wise, corals at top of the tank receive around 550ish, 350 in center and about 250-275 at bottom glass
