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What is this on My Live Rock? (1 Viewer)

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hankintexas

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I have what looks to be a white spider web growing on my live rock. It appears to be growing and I do not know if it will hurt my tank. The tank was just started and the live rock came from another tank we just bought.
Should I pull the rock out and scrub it?
 

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steveb

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Your photo is way to small.... load it up on an image hosting site (flikr, photobucket, etc.) and paste the url here.
 
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hankintexas

hankintexas

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Let me try that again. sorry

20130824_1049543_zps0534846a.jpg
 
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hankintexas

hankintexas

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Can you zoom in on whatever it is you want us to look at and post that?

I added another picture with a zoomed photo. I think it is Pic 2.

20130824_104938_zpsb6db0965.jpg


That is the best I can do. Think I am going to remove the rock and place it in another tank that is unused with fresh saltwater..... I am going to scrub the rock with a brush and saltwater first though. Plan to do this tonight and hope it solves it.
 
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steveb

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It looks like some type of sponge or maybe a bacterial growth. I would probably scrub it off in some saltwater if it was my rock.
 

OceansX

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Hank,

It looks similar to stuff I have on the underside and dark areas of my tank that grow pretty slow.
If it doesn't smell bad and feels solid, I would leave it alone, but place it away from the light.
It's probably some sort of sponge or colonial animal that was growing on the underside of the rock.

If it's slimy/stringy soft and/or smells bad, it's probably a bacterial/fungal film decomposing
something that has already died. Brushing it and/or siphoning it off will keep the tank cleaner.

Personally, if you are unsure of what it is, I'd just leave it alone. What's the
point of having live rock if one kills everything on it. Whatever it is, it will
self-limit eventually. If it is a colonial animal and you kill it then you definitely
will have a bacterial/fungal/ammonia spike finish it off.

Just my 2 cents...
 

steveb

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True. since I cant see it that well I as erroring on the side of caution.


Now if it looks like this up close - by all means pull the rock and dip it in bleach...

IMG_1433.jpg


Those are colonial hydroids that will end up killing coral and getting in everything...
 

OceansX

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Yeah,

I really can't see anything in the picture. It could be a bleached out coral for all I know,
but I'm sure Hank could identify that :)

In general, I am "anti-nuking" and prefer to deal with trouble spots locally, but
that's a matter of preference and opinion. I don't think I ever dealt with a hydroid
outbreak, though?

That's a great picture Steve. Do those sting enough that you would feel it on your hands?
 

steveb

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Not that I noticed but I have to admit I never "tested"... They do sting well enough to kill coral and are very invasive... Once they get a foot hold in the tank they are almost impossible to get rid of short of nuking the rock or treating with Fenbendazole which will coral and inverts as well.
 

cacarnold3

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I think it is a sponge of some sort. I have the exact same thing in my Gulf tank. It is on the bottom of one rock that I rotated so now it is the top. Doesn't seem to bother anything and the blennies are good with it.
 
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hankintexas

hankintexas

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Thanks all. I think I will keep an eye on it for a while for growth. It is like fine cobweb. My Blennie is busy eating as it is. I will get my other camera out this weekend and get some more pics. Just started this tank. Now I have another 50 gal, a 110 and a 215 to go......
Want to keep things as simple and clean as possible while getting back into this hobby......
 
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