Diatoms

[ahpchagi]

I got small, (.06x .11xvery thin) brown colored rectangles on the glass and rock and sand bed. Not a mat of material, but small rectangles. Diatoms?, algea? Water parameters are good all over. Has any one seen this before?

 

[mopar9012]

Do you use tap water? How old is the tank? Can u brush it right off the rocks? almost like its just dirt in there...I had diatoms for 2 months...