What the hell is this and what made it?????????????

[FishieBusiness]

My tank has been running for 13 years now and it time to get bigger. I have never seen any pests in the tank other than a bristle worm or 2. With that said. I'm switching tanks tonight and started with moving rock. Much to my surprise when i flipped this rock over I find something that looks like a tunnel network. It is not a hard material but rather soft and smooth. If you try to remove it by hand it just falls apart.

Has anyone ever seen anything like this? Any idea what made it? Is this bad/dangerous?

 

[BiGGiePauls33]

Looks like sponge to me.

 

[Chris A.]

Do you dose a carbon source like nopx or vodka?

 

[Chris A.]

Actually it does look more like a sponge

 

[FishieBusiness]

Nope I dont dose with anything yet. Not sure when you should dose and with what.

 

[Blader1234]

I'd also guess sponge

 

[Terry Martin]

I found something very similar when I took rocks out of a tank to remove bubble algae. Don't know what it is but doesn't appear to have done any harm.

 

[showard]

Its a white sponge of sorts, a friendly filter feeder! If your lucky youll get colorful ones. I've got tons of yellow ones in my display

 

[Chris L]

Sponge

 

[frank180reef]

Sponge

 

[FishieBusiness]

Thx for the response. And now i know that i have sponges in my tank. Lol

 

[FishieBusiness]

Hey Chris thanks, its was nice meeting you at the show

 

[showard]

Thx for the response. And now i know that i have sponges in my tank. Lol

Sponge on!