Brown sand?

[Loynzey]

Can some one tell what this brownness on my sand is called and how I get rid of the problem?

 

[TomStav]

Diatoms, how established is your tank, it usually is found in newer aquariums. Are you using RO water? Vacuum it out.

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[melosu58]

Looks like diatoms to me also. Sometimes cyano will start out brown. I too would siphon it out just in case.

 

[Loynzey]

Tanks been running since early December 2010 I do syphon it with a gravel cleaner when I do a WC but with in the week it grows back! Yes I use RO water

 

[TomStav]

It may just go away as the tank matures, are your nitrates at 0? You could try cutting back on the lighting a little bit each day...

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[SteveFishman]

What do you have for a CUC

 

[newreefaddict]

Deff. Diatoms. How much water flow do you have. I had a similar problem when my tank was just starting but put 2 MaxiJet 1200s in there and have been good ever since

 

[Loynzey]

I have 3 red legged hermit crabs and 6 cowrie snails.

stock sera flow pump stp 1000 feeding a spray bar.
And ive also added a newave pump which says on in l/h 750-1400

 

[XxVooDooxX]

my sand looks like that too but my tank is only a month old. Im hoping that they go away soon. I have to clean it off the glass once a week or so...maybe less