Geoff,
We had a discussion about lighting at the last Atlanta Reef Club meeting. My Acros look different in my wife's and son's tank. Even though the same parent colony I use 250 watt 20KXM bulbs and Lisa and Justin use PCs exclusivly. I get all three colors, Lisa still has the purple and justin's acros are brown. I am guessing mine is the most intense between the three, lisa's is second (220 +55 Watt PC 10Ks and Actinics on a 29 gal tank) and Justin has 39 watts on his 10 gal nano. I am thinking the corals just respond to different spectrums.
I do think actinics are greatly responsible. BTW I use 250 Watt XM bulb on one side of my tank and 110 Watt PCs on the other side of my 40 gal breeder.
Ray
We had a discussion about lighting at the last Atlanta Reef Club meeting. My Acros look different in my wife's and son's tank. Even though the same parent colony I use 250 watt 20KXM bulbs and Lisa and Justin use PCs exclusivly. I get all three colors, Lisa still has the purple and justin's acros are brown. I am guessing mine is the most intense between the three, lisa's is second (220 +55 Watt PC 10Ks and Actinics on a 29 gal tank) and Justin has 39 watts on his 10 gal nano. I am thinking the corals just respond to different spectrums.
I do think actinics are greatly responsible. BTW I use 250 Watt XM bulb on one side of my tank and 110 Watt PCs on the other side of my 40 gal breeder.
Ray