I think I have mold??

View attachment 2065393View attachment 2065394View attachment 2065395View attachment 20653962012-02-13 13.20.16.jpgIm doing a PC box grow, its been above soil for about 2 weeks and I just opened it tonight and noticed this green stuff on the soil. I have low temps(around 60 ambient but it gets to about 75 at the soil) and low humidity (16% with humidifier) I watered it last night, I usually have to almost every other day, it dries out fast. I didnt notice any of this green stuff in the morning or in the afternoon when I checked today, but just tonight its kinda getting around. I use fox farms potting soil natural and organic. This is my first grow so Im not sure whats happening..
 
thats algae, nothing huge, but it can eat up some of the nutes.

stir up the dirt, or put a layer on top of it.
 
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