White mold on my rock?

[pancho]

I have been cycling my tank for a week now, and all the live rock i had in there has become brown and looks dead. I also noticed this white moldy looking stuff on the dry rock i have in there. Is this all part of the cycling process or have i done something wrong?
Its a 29 gal with about 40 lbs of rock in there (about 15 of which was bought live).

 

[lando]

Sounds pretty normal. A certain amount of die-off onthe LR is expected. The white patches could be dead coraline.

 

[pancho]

should i leave it on there? A friend of mine suggested buying a toothbrush and scrubbing it off. Will it dissapear after a while?

 

[melosu58]

No dont scrub it off as new coraline will regrow if your conditions are good.

 

[roka64]

Sounds like a possible sponge. Does it look like clearish/white/mold? I would leave it in there. Any chance you can get a pic?

Will it dissapear after a while?

If it is what I am thinking it is, mine made it through the cycle but got eaten by my urchins.

 

[pancho]

White moldy stuff

Here is what it looks like. Its on more rocks now, at opposite ends of the tank.

 

[roka64]

That looks almost like what I had. I believe it is some sort of sponge. Please feel free to correct me if I am wrong.

+++EDIT+++

You may want to try and get this moved to the ID forum, there are some folks that can probably tell you what it is.

 

[melosu58]

I`m going to move it there where it will get better attention.

 

[phish7740]

sorry to bring up an old topic...but can anyone id this white stuff... i now have it in my tank and would like to know if it is harmfull or helpful????


thanks

 

[Devilishturtles]

Looks like a sponge to me.

 

[roka64]

Harmless sponges. I have them pop up now and then, but my urchins seem to love them.