Dark Grey Fuzzy Stuff On Rocks/Sand

[Nat_a126]

Can someone help identify what this is?


And this on the sand?

 

[Nat_a126]

And lastly, this brown in the sand. My sand bed is 1.5 inches deep

 

[jrcordero4]

The brown stuff looks like detritus. It looks like your tank is new. How old is it?

 

[bribo12]

Don't worry about the brown stuff in your sand. What kind of flow do you have in the tank?

 

[Nat_a126]

The brown stuff looks like detritus. It looks like your tank is new. How old is it?

It was filled January 8th and I put in some chromis a week ago. Can detritus stick to rocks in little short hairy clumps?

 

[Nat_a126]

Don't worry about the brown stuff in your sand. What kind of flow do you have in the tank?

What's the brown stuff though? And by what do you mean by what kind of flow?

 

[bribo12]

Do you have powerheads? How many and what gph? The brown stuff is diatoms most likely

 

[Nat_a126]

Do you have powerheads? How many and what gph? The brown stuff is diatoms most likely

It pumps about 500 gallons per hours and I got two of these and the stuff isn't brown, it's grayish black