What is this stuff?

[runningwild24]

Does anyone know what the greenish stuff on the rock is? It is all on the bottom too.


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[Cake_Boss]

Pics?

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[runningwild24]

There should be links... are they not working?

 

[Dbarnes]

Nope links are not working

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[runningwild24]

How's that?

 

[CRW Reef]

Looks like a sponge to me. They are fine for the tank.

 

[Cake_Boss]

Looks like a sponge to me. They are fine for the tank.

+1

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[SAZAMA]

sponge

 

[Wicked Color]

I agree with the consensus.

 

[runningwild24]

ok, that's what I was thinking but I wanted to make sure it was ok. Thanks!

 

[Punjab]

Not only is it ok but it is a sign of relatively good water quality and a good show of diversity. I try to spread it around to every nook and cranny of my tank.