Over two months since my last post....sheesh! I'm getting ready to take some new pics later this week, but here's the text update of what's been going on.
First and foremost, I did get that new light. I took a chance and went with the Aquatraders 150W fixture, the kind with 2 14W actinic T5 bulbs with it. So far, I'm really happy. I bought a 20,000k bulb as well to see the difference. The Oddesea 15,000k bulb (the one the fixture comes with) is VERY yellow after burn-in, and the color spectrum IMO has too much red in it....it helped fuel a hair algae outbreak. The 20,000k bulb is a very pretty blue-white, but I suspect the PAR values on these discount bulbs are...pardon the pun....sub-par. My corals are DEFINITELY happier than they were with the PC lighting, but I am still going to get an Ushio 14,000k and maybe a 20,000k bulb to see how they look. Seems that the Ushi's are a little cheaper right now than they used to be, so now may be a good time to get them.
The light fixture itself is performing very well. The ballast is silent, and generates almost no heat. It's barely warm to the touch, in fact. The fan that cools the fixture could use some DIYing by opening up the grilles a little, but even that mod may not be absolutely necessary. The added heat from the new light has raised my tank temperature to 74 to 75 during the day, and that is with the iceprobe running and a computer fan blowing across the water surface. I get about a gallon of evap a day between the fan and the MH over the open top.
Corals have generally responded well to the new light, with a couple exceptions. I've mentioned this before in another thread, but here it is again: apparently I'm not allowed to keep some of the "easy, beginner" corals. Xenias die off at a mere look from me, and my GSP just slowly withered away. Even my pulsing Xenia, which lasted longer than my two regular varieties, commited a weird form of suicide by releasing all of its polyps from the main mass. Now I have a dozen or so little tentacled arms floating around the tank....I figure I'll leave them alone and see if anything attaches. If not, oh well. I'm kind of over the whole xenia attempt right now.
On the other hand, my little Montripora frag I got almost 6 months ago is responding really well to the light. It had gone into hibernation mode, but now is starting to grow little stalagmites up off of the main plate. Interesting. The Pagoda cup coral frag has probably seen the most growth, and has really rounded out into a small...well, "cup." The mushrooms, zoas, and ricordeas are all pretty much unchanged, and the leather coral seems happier with the increase in light. The Kenya, on the other hand, has been sulking under the yellow 15,000k bulb...but seems to be happier now that I'm using the bluer bulb. The new corals, including a nice purple/pink chalice frag and a red Acan, are both doing well so far.
I finally had to break down my 110g tank, as I mentioned in another thread. My two favorite fish, a Mckosker's Flasher Wrasse and my male Green Mandarin, are now living peacefully alongside the seahorse and sand goby. I have no worries about the sustainability of the large male mandarin in this tank because he eats both frozen mysis and pellet food....in fact he gives the goby a run for his money in terms of speed eating!
The extra bioload of the two fish was probably the other factor in contributing to the algae outbreak. Between this and the light, I had a few weeks of slime on the sand and hair sprouting on the rocks. The slime is gone, and the hair algae is receding, so I'm hoping that the bioload is balancing out. Water changes and some fresh Purigen and Phosguard helped out, I'm sure.
That's about it for the update. I just finished a water change so I'll snap a few pictures of the setup tomorrow after everything has settled back down. Thanks for looking!