Lighting opinions please, and education

lanimret

AC Members
Apr 1, 2008
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So when I bought my tank I bought it from a local guy selling in my area. I know the equipment is in general absolutely top notch (oceanic 75g, stand, aquaclear sump, etc) and the lighting system is almost overkill, but I got to thinking that I do not really know what is in the thing and even what SHOULD be in the thing in the first place. So I wrote down all of the info and wanted to run it by everyone here and see what I should know.

The fixture itself is an 8 bulb Tek-light fixture, this is it:
[URL="http://www.marinedepot.com/ps_ViewItem~idProduct~SL2121.html"]http://www.marinedepot.com/ps_ViewItem~idProduct~SL2121.html[/URL]

It has two banks of lights, the inner 4 and the outer 4. The inner set is on an 8 hour per day schedule, the outer set is on for aprox. 4 hours per day. The lights are 7 inches from the surface of the water inside a custom built hood. The hood has two built in 120mm fans that kick on whenever both banks are on (they are a little loud so I do not run them constantly, heat only seems to be a prob when all 8 are on).

So here is the list of bulbs in order:

1. Gersemann 54W aquablue +
2. Current 54W actinic T5HO 460nm
3. Coralife 10,000 F28-T5-BP
4. F54T5 10,000 (no branding that i can see)
5. Geisemann 54W Actinic+
6. Geisemann 54W Pure Actinic+
7. D&DoAQ Midday 6,000 54W
8. Coralife 6,700

Again, the outer bank is 1,2,7,8 and the inner bank is 3,4,5,6

I also have a set of 6 blue led's mounted inside the hood for moonlighting.

My questions are:

1) There is a large variety of lights here, no two are identical, does this setup look appropriate for a reef tank or would I be better served changing any of them out or moving them to different banks, etc?

2) Is my timing setup appropriate based on what I have?

3) How do I know when any of these need to be changed? The person I bought them from said they were all brand new, but I do not even know how to tell. Bulb 7 seems dim to me, but I was told by my LFS that this is normal for that type of bulb.

4) Basically were this your light system, how would you have it configured for my situation?

Thanks in advance for the advice, I feel like I am really out of my league as far as this goes and want to make sure I have a basic understanding of what I actually have before I need to solve any problems.
 
1) I don't see any problems with that variety of bulbs or the configuration. I'm not a fan of the Current (brand) actinic bulbs, but they're ok.

2) It's hard to say if your timing is appropriate... you didn't say what you plan on keeping in the tank. "Reef" is a very general statement -- looking to keep soft corals, LPS, SPS? If so, try to name a couple in each category that you like, as there's high light soft corals and lower light SPS as well as lower light soft corals and higher light SPS. The photoperiod a little shorter than what I run, but not necessarily too short.

3) Normally driven T5 HO bulbs last:
12 - 18 months for actinics
18 - 24 months for daylights
There's really not a good way to tell visually if it's time to replace them.

4) Without knowing your plans for the tank, it's hard to say if I'd have that bulb configuration and that photoperiod. Please elaborate on your plans.

In general, it sounds like you picked up a pretty nice tank!
 
thanks for the info.

At the moment i have a small variety of polyp's, and 3 quadicolor bubble tips, lots of inverts and 6 fish (1 midas blenny, 2 benghi Cardinals, 1 jeweled damsel, 2 false percula clowns).

I plan to add, as the tank matures, a decent variety of other corals, sps even (dunno about LPS at the moment, but i believe the lights will support that ifI chose to). 4-5 more fish, and that would be about it. I actually plan on getting back down to 1 anemone, it split into 3 and I am just waiting for the clones to stabalize a bit before I sell them back to the LFS.

Corals I have been considering would include:
Birdsnest Coral
Acropora (probably blue)
Leather coral of some type
tree coral (carnation maybe)
brain coral

I have not made any hard decisions yet though
 
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Well, the good news is that those lights on a 75g will support everything you've listed. You do have quite a bit of light for that tank, but that will not be a problem for some of of the lower light corals you may end up with. Any lower light corals that you might choose can be acclimated over time to the lighting and kept low in the tank once their acclimation is completed.

Any plans for a clam? If so, you'd still be fine.

The lighting you have will provide you with a great deal of flexibility. With 8 bulbs, you can tweak the lighting to fit the needs of the corals you'd like to keep as well as your visual preference.

I'll describe the light schedule I run and you can decide if you'd like to alter yours (5 T5 HO, 2 overdriven, on a 90g with a variety of zoas, mushrooms, leathers, frogspawn, hammer, Montipora, Stylophora, Pocillopora, Acropora, open brains, closed brains, a clam). My tank does have several fewer bulbs (although 2 overdriven T5 HO bulbs pretty much equals 3 normally driven T5 HO bulbs) and is slightly taller, which are two things to keep in mind. I run our actinics from 7 am - 8:30 pm and our daylights from 11:30 am - 6:30 pm. It's kind of a funky schedule, but it's worked fine. I like to be able to see the tank in the morning before I leave for work, which is why the actinics come on at 7 am. It's also nice to be able to enjoy the tank in the evening once we get home from work.

BTW, the corals commonly referred to as carnation coral are non-photosynthetic particle grabbers and require frequent feedings to keep alive long term.
 
wow, great info, thanks so much.

I think what I am going to do based on this is:

1) Reverse my banks for awhile, have the outer bank on longer, as it is less bright and more actinic. Have the inner bank on for the shorter duration.

2) Increase my light schedule to 10 hours and 5 hours respectively, see how that goes for awhile.

And yes I would love to get a clam, but was waiting till the tank was atleast 6 months old before attempting that.
 
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