cycling

[dwint]

i had to put copper in my fishless tank and had it all removed and tested.i kepted my bio wheels and sand and my paremeters are perfect but my sand is turning brown like it is cycling over.how could this be if my tests are perfect?

 

[crister13]

Diatoms. They eat silicates. Theyll go away after the silicates are all gone.

 

[dwint]

ok thanks