What the hell is this?

[Bulldog39]

My tank is being drilled and sump made so my rock has been here straight from online and started changing or growing stuff. Why it was white 5 days ago. Also never been in a tank just sprayed off

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[thegrun]

While you may like the brilliant white look of your rock when you first got it, in a marine environment white is a sign of death or a complete lack of life. It looks like normal diatom and algae growth, with any luck you will never see that brilliant whiter rock again.

 

[Bulldog39]

While you may like the brilliant white look of your rock when you first got it, in a marine environment white is a sign of death or a complete lack of life. It looks like normal diatom and algae growth, with any luck you will never see that brilliant whiter rock again.

It's not in water I'm waiting for my tank to be finished. I just have it in a practice auquascape

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[thegrun]

Probably just oxygenation then, although it's not common to that extent.

 

[snowlynx]

Where did you get the dry rock?

I use caribsea southsea rock, it's great, rinse thoroughly and add to tank.

Some other dry rocks have amazing oddities that come to life once back in water.

I bought few pieces of tonga shelf rock from BRS. Didn't cure it, thought
I could just rinse like caribsea and drop it in the tank. Few weeks later,
lot of odd stuff grew out of it.

 

[Haunt]

Other than what might be sponges, I'm just looking at pores... (a DEEP filtration perhaps) Were the rocks light or heavy? They can all work in the right hands though. GL.