help me figure out what is this white thing taking over my tank is.

[Pepone]

 

[ISpeakForTheSeas]

Benthic ctenophores (A.K.A. comb jellies).

 

[Pepone]

Benthic ctenophores (A.K.A. comb jellies).

thanks for the reply. how can i end it?

 

[ISpeakForTheSeas]

thanks for the reply. how can i end it?

The only method I've heard of being used successfully is manual removal:

They don't really reproduce very quickly so you can usually eradicate them by just physically removing them. It's a little harder if they're settled on the rock, but something with a hard edge will help lift them off, so that you can just siphon them out. If they're on a coral, they're usually easy enough to scrape off with a fingernail.

Edit: I should be clear; the threads that you see from them regenerate pretty fast. You need to extract the bodies if you are going to get them out for good.

The posts by the user killergoby in the link below may be helpful for identifying the bodies (which are what you need to remove) rather than the feeding appendages (which will just regrow if removed):

Very long sweepers at night. Need help to ID

I’m seeing some strange organisms in my tank at night. At first I thought vermetid snails but I don’t see any tube-like shell. These sweepers or whatever they are, are VERY long, some probably 12-13 inches. They are soft and fuzzy at the base and I can pick them off with a tweezers. You can...

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