Rust or Brown Color Algea

[scubaguy]

I am worried about these rocks. They have a Rust colored or Brown colored algea on it is this in the pictures good algea or bad algea. The base rock under them is starting to take on them algea also. The tank is now going on three months. Last reading were :
SG 1.024
PH - 8.4
Nitrite 0 ppm
Amonia 0 ppm
Nitrate 20 ppm

 

[mopar9012]

doesnt look bad to me

 

[scubaguy]

I was just worried the base was also taking on the algea but when I do water changes it comes up easy.

 

[dr.vinyl]

What kind of lights are you running?
My started to do theiss after T5's were installed
coraline should soon follow

 

[scubaguy]

Money Money. I do not have it so I am stuck with just a 24" 20 Watt florescent Light. I am waiting till next pay check to get a 36" twin florescent with a two strip lights. Unless I win this ---- for a better light.

 

[drew2005]

Looks like diatoms to me. Common in new tanks. It will eventually disappear.