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Old 12-09-2013, 03:46 AM   #1
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Trouble with my corals, could it be the led's?

So I took the plunge with my new 180g build and got 3 led panels, the tao knockoff. They are dimmable as well. I installed them about 3 weeks ago and have nothing but trouble with them.
The first week I had them on 50% for blues and whites and lost several corals due to frying them. Ok, my bad, then adjusted them down to 25% each and most of my corals wont even open. My huge gspn looks to be just about gone and my duncans are on the sandbed and wont open. My gigantic toadstool opened for a few days but now nothing, not a single polyp is opening.

I am just about ready to put back the t5 12 bulb fixture and call it a day. Everything grew under that light wonderfully and quick. From mushrooms to sps. My mushrooms are under rocks and still wont open. I can say only one coral is doing ok and thats a leather that is half way up in the tank.

What should I do? Wait it out some more or save what I have? I dont think I can go any lower really on the dimmable leds and going higher just fries them.

Any help would be most appreciated, I am new to leds, maybe I am doing something wrong....
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180g Reef - 60g Rimless Reef -90G FOWLR- 125g Malawi Cichlids- 40b REEF- 34g Fresh Planted-working on- 20L FOWLR- working on
I have a mix of many different saltwater fish amongst my tanks, but I love my Tangs most of all.
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Old 12-09-2013, 05:37 AM   #2
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12 bulb to led shouldn't be to much of a stretch so questions first
What's your photoperiod ?
How far above the tank are the LEDs ?
90 or 120 degree lenses ?
My personal experience a with switching to LEDs was not as bad but I was only, and am still primarily doing soft corals, I started at @ 30 percent on the whites and blues and every 7-10 days bumped it up about 5 percent without much issue. The only thing I have noticed is a sight diatom out break for 2-3 days after upping the percentages and then it would just disappear.
My two tad are @ 9" above my 24" deep 65 gallon.
They have the 120 degree lenses.
And my programmed photoperiod is scheduled like this
7:30 am 3 nightlight LEDs come on
8:30 am blues come on
9:30 am whites come on

8:30 pm whites go off
9:30 pm blues go off
10:30 pm night lights go off

The night lights on my units are much to bright to be considered night lights, as even only 3 at full power will get my corals opening up.
I found with the LEDs it's better to err on the side of caution maybe up them until you see your corals open slightly and leave it there for a week and then bump it 5% and wait another week. My lights have been up for months and I'm still only at around 80% on blues and 50% on whites
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Old 12-09-2013, 12:56 PM   #3
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If it's like when I upgraded to my radions, it's the intensity causing issues.
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Old 12-09-2013, 02:52 PM   #4
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I had an easier time because I upgraded from MH. The LEDs are far more intense than the softer T5 lighting. Previous advice is good, start real slow and work them up to it.
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Old 12-09-2013, 03:42 PM   #5
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You cooked the corals immediately putting them under the LED panels without a good acclimation. Now the damage is done. You have to wait it out. No need to switch to T5s.
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Old 12-09-2013, 06:05 PM   #6
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That's the problem with LEDs, for some reason people don't expect them to work or something. They are far more powerful than most anything except MH. The tank will look darker but will still be delivering more PAR than the T5's did. I run mine a full power but my reef is 34" deep. And this reef was initially grown under 1500 watts of MH. Your corals should recover, but it might take a while. If we lived closer I would bring my PAR meter over and you would be shocked at what those lights put out.
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Old 12-09-2013, 06:21 PM   #7
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I think they way surpass halides Greg. Efficiency per watt I mean.
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Old 12-09-2013, 06:30 PM   #8
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Quote:
Originally Posted by mr_X View Post
I think they way surpass halides Greg. Efficiency per watt I mean.
Yep. I agree, but they vastly outperform T5's. Here's how mine works out:
LED
to replace almost 2000 watts of MH and actinic. And I have 30% more PAR or greater.
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Old 12-09-2013, 06:35 PM   #9
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200 is plenty on the sand bed! You could get by with 50. ...and shut that bird up!
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Old 12-09-2013, 06:37 PM   #10
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200 is plenty on the sand bed! You could get by with 50. ...and shut that bird up!
Yes, I know and at the ends of the tank it drops to about 100 PAR. Gives me lots of choices as to placement. The bird never shuts up. This is the one you're hearing now. He loves to pull hairs out of my mustache, it hurts.
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