ichthyoid;415699 wrote: Dave, I saw pictures of your tank while it was TOTM. I must admit I was pretty awestruck (along with MOJO's and a few others). I am very interested in the lighting/coloration relationship. Do you mind sharing what you use?
Also, if I ever got the oportunity to see in person, or have your buget for electricity, I would be 'in the zone'. -lol
I have Coralvue electronic ballsts, Lumenbright Mini pendants, and Radium 400 watt 20K SE bulbs. I initially used Helios/EVC bulbs (same thing), but found that since my corals had grown from stick frags to colonies with canopys like trees do, the Helios/EVC bulbs, while great in color, just were not cutting it for me PAR-wise. I did some testing of 400 watt Helios/EVC 20K SE bulbs vs Radium 400 watt 20K SE bulbs with an Apogee Quantum Meter, and found that at any given spot in my reef, the Radiums had anywhere from 65-100% more PAR than the Helios/EVC.
I discovered the lighting issue because after my acros got larger, I had some STN issues on a few of my colonies. I didn't have any chemistry issues, and no pests, like AEFWs or Redbugs. So after banging my head against the wall and finding out a dozen things that didn't cause it, I just gave up. But I also decided to try Radium bulbs because I had heard good things about them.
Switching to the Radiums stopped the STN on my colonies like flipping a light switch, it was that fast. It stopped, and the corals that had been STNing started to regrow. It was absolutely amazing, and I cannot attribute it to anything else.
Then I got those incredible PAR differences with the Apogee, so I think that basically my acros outgrew the PAR provided by the Helios/EVC bulbs and needed a stronger bulb, like the Radiums.
Dave