Rock and sand turning rusty orange

[Salesbig]

I transfered my 55 to a 90 corner last week. I added cured rock and changed the sand.
About 2 days ago rock and sand are starting to turn orange
I tested for nitrates, nitrites and amonia and all at 0
Any ideas?
Btw.. All fish and coral are doing great.

 

[Deanos]

Diatoms.

 

[Salesbig]

Diatoms.

OK will run ronens diatom filter tomorrw and see what happens..
Thanks

 

[Chiefmcfuz]

Just let it go, your cleanup crew should take care of it over time.

 

[Deanos]

OK will run ronens diatom filter tomorrw and see what happens..
Thanks

Diatom filters polish the water column, not the rockwork and substrate.

 

[Salesbig]

Diatom filters polish the water column, not the rockwork and substrate.

SO just let it run ? is it a cycle?

 

[Chiefmcfuz]

Yes it's part of the cycle. All new tanks go through it. I just went through one when I changed my lights.

 

[Salesbig]

Yes it's part of the cycle. All new tanks go through it. I just went through one when I changed my lights.

Oh yes.. I Changed my lights too..