White growth on live rockrock

[Tbird165]

I was fixing the rock in my tank when I found a white rubbery mass growing on the under side of a rock. Any one know what it could be?

 

[Daytonareefing]

Looks like a sponge.

 

[Tbird165]

Cool. If it is do I need to put the rock with the mass facing down or facing up?

 

[Daytonareefing]

Its up to you it won't matter. If you want to play around with it and watch it grow you could get some zeovit sponge power it makes sponges grow a lot faster as it is food for them I use it. I have a piece like yours with yellow sponge on it.

 

[Tbird165]

Now do sponges need light? Because I heard they are good for dark refugiums

 

[Daytonareefing]

I think they do but I have seen them grow on the bottom of rocks with no light but it may that each sponge is different when it comes to how much light they need.

 

[Tbird165]

I was going to look into finding a couple sponges for my tank now I dont

 

[Cyndi & Jim]

That particular sponge doesn't require much. They're great for filtration.

 

[Tbird165]

So you are saying low lighting?

 

[Tbird165]

And will a Urchin hurt it?

 

[Cyndi & Jim]

low ligt on that particular sponge works best. Not likely that urchins will harm it.

 

[Tbird165]

Thanks cyndi. I moved the rock with the sponge to the refugium I just setup under the tank for right now.

 

[Cyndi & Jim]

Should suit it perfectly. Anytime!