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Egg sacs? Pests? Idk...


kylexarbor

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So I have these egg-like sacs attached to the side of chamber 1 in my biocube 29. I have no idea what they could be. I have no fish, 1 coral banded shrimp, 5 red leg hermits and a turbo snail, 1 squamosa clam. I have mixed corals; pollicipora, Xenia, clove polyps, Montipora, zoas, goniopora, gsp, brain maze, toadstool. 

 

Temp: 80

SG: 1.026

pH: 8.4

ammonia: 0

Nitrite: 0

Nitrate: <10

kH: 9-10

Calcium: 420

 

i protein skim and use a uv sterilizer. Filtration is floss, purigen, phosguard, chemipure elite. Water change 30% every week using ro/di water and instant ocean.  Tank has been running for about 6-7 months. I have noticed excess detritus buildup in the chambers lately. Not sure what these buggers are. Please help

37E99DD7-2700-467C-B6E8-A2F8DC15D882.jpeg

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1 hour ago, Oldsalt01 said:

Pineapple sponges. Good filter feeders and part of the CUC. Harmless and will come and go over time.

Thanks for the feedback. I was freaking out for a little bit there. 

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They can be a bit startling when you first notice them, but they generally show up within 3-6 months of a tank starting up. I see you have a healthy crop of spirobid worms too. Another hitchhiker that is harmless. I generally leave them alone too. How about a pic of your tank?

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1 hour ago, Oldsalt01 said:

They can be a bit startling when you first notice them, but they generally show up within 3-6 months of a tank starting up. I see you have a healthy crop of spirobid worms too. Another hitchhiker that is harmless. I generally leave them alone too. How about a pic of your tank?

I’m unsure of the worms, because I don’t see what you see but I’ll post a pic of my tank tomorrow. When the lights come on.

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1 hour ago, Oldsalt01 said:

They can be a bit startling when you first notice them, but they generally show up within 3-6 months of a tank starting up. I see you have a healthy crop of spirobid worms too. Another hitchhiker that is harmless. I generally leave them alone too. How about a pic of your tank?

Okay I looked them up and see what you’re talking abkut. I thought that was calcium carbonate buildup. Good to know! They’ve definitely multiplied a lot over the existence of the tank. They are all over my rockwork and back panel.

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They generally come in on live rock, but I've had them in tanks that started with dry rock/sand and no introduced critters. The only vector I could figure out is some sort of larval stage that came in with the LFS water I bought. Just one more mystery about reef keeping.

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