The LED tubes are these:
10,000k
http://cgi.ebay.com/AQUARIUM-LED-LIGHT-TUBE-4-foot-300-LED-w-plug_W0QQitemZ330381164846QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item4cec40812e
20,000k
http://cgi.ebay.com/AQUARIUM-LED-LIGHT-TUBE-20-000k-3-foot-198-leds_W0QQitemZ230404550405QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item35a52e6f05
I just have them stretched over the top of the tank resting directly on the trim, so they are VERY close to the water surface.
So far, I am seeing GSP growth, Anthelia growth, some Zoa growth, some Paly growth, and I have a very happy scoly on the sand bed, as well as a small acan frag on the top of the right side of my rocks that was darn near dead when I got it(so much so that the vendor at MACNA threw it in with my zoanthid purchase just because he hoped someone could revive it)
I also have a very happy toadstool leather in the center of the tank on the sand bed. However, I have noticed that the “tips” of the polyps are not as greenish as they were under the 150watt MH that I was running
The zoanthid growth is not as rapid as I would like to see, or have seen under previous T5 setups, but they are healthy.
I am considering replacing the 20,000k tubes with more 10,000 k tubes as well as possibly some all blue high intensity tubes that the same guy just came out with in hopes of getting some more color. The 20,000k tubes just don’t seem to be as bright as the 10,000 k tubes.
On another note, My electric bill went down noticebly when I switched from the MH to the LED tubes!
I am also keeping a fairly happy frogspawn, as well as a couple of pulsing xenias. Their color could be better, but other than that, they seem happy, and healthy.
And of course those dratted hairy mushrooms you see on the bottom would probably spread if I kept in the toilet tank! Started with 1, now have about 20 of them total in 3 different tanks! They are pretty when they open, but dang it do they take everything over!
I wouldn’t consider keeping SPS or more picky LPS under this setup for two reasons. 1, the LEDs do not in my opinion provide the PAR and intensity those corals need, and 2, I do not run a nutrient free environment, which I believe contributes to the happiness of some of my softies. They definitely seem to like the environment they are in. I also use reef crystals, and I do not have an “uber skimmer” like some, so I don’t feel I have the proper environment for them.
But, that being said, I have also been doing alot of reading about appropriate photo periods coupled with getting the flow to match your lighting to keep the respiration up on SPS having alot more to do with their success than just lighting alone. Have also been experimenting with Jake Adam’s concepts from MACNA regarding laminar flow, creating that “gyre” circular flow and allowing obstacles to create turbulance. So far, so good.