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Old 11-02-2011, 12:54 PM   #1
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Corals Bleaching from base?

I have a saltwater tank that I bought off of a friend of mine who propagated the coral himself. I've had it for about a year now, with no problems. No changes in chemistries or temperatures, coral healthy, and fish happy. I am starting to see however, the coral is bleaching at the base. What could be causing this? Again, no changes in temp, chems, etc.

1. Type & how long you have had it: Saltwater Reef, 1 year
2. Current lighting & Bulb Age: New
3. Nitrate: 0
4. Calcium: 350
5. Phosphate:
6. Alkalinity:
7. pH: 8
8. Salinity:
9. Temperature: 80
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Old 11-02-2011, 01:00 PM   #2
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What type of lighting? T5's, flourescent t8's, leds'? How many bulbs?
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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 11-02-2011, 01:17 PM   #3
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T5s (three of them) with 8-led (blue) nightime bulbs.
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Old 11-02-2011, 01:21 PM   #4
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Sorry I didn't ask what size tank? that doesn't seem like enough light to bleach out corals unless the tank is small and/or the corals are placed too high up.

How many corals and what kind are they? Do you have a picture of your tank?

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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 11-02-2011, 01:25 PM   #5
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Corals in question are:

Green birdsnest
Green Acropora
Montipora Digitata
Orang Digitata

They are spaced throughout the tank, in different areas, so I dont think it is a water-flow issue. My tank is a 65-gal saltwater (RedSea).

I can definitely take a photo...
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Old 11-02-2011, 01:32 PM   #6
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Ahhh SPS corals. I see what you mean now. I have a bushy arcopora that happened to. It turned white coming from the base up to the tip. Eventually the entire tip died. :-( It's still on my coral now, and the rest of it is fine. This happened to mine a few months ago. I was glad it didn't spread to the other arms...
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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 11-02-2011, 01:36 PM   #7
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All i can attain is its a bacterial thing... vibrio, maybe?
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Old 11-02-2011, 01:47 PM   #8
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My lighting should be adequate, right?
234 total watts in a 65 gallon tank.
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Old 11-02-2011, 01:48 PM   #9
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If the corals are placed correctly yeah, that should be enough light.
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Old 11-02-2011, 01:54 PM   #10
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Yeah I can't see why it isn't enough light, they've been fine for over a year, up until now.
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