I'm getting green algae on my glass....el natural

I was just wondering if anyone could point me in the right direction. I'm trying a non-co2 'el natural' tank which so far is doing splendidly, BUT within the last few days I have developed a fair bit of green (dust?) algae on the glass. It's not hurting anybody yet but it's unsightly. Would this indicate any type of deficiency, or is it just something I have to deal with in a low maintanance tank? I also just added a full fish load and this algae started around the same time. I guess that indicates something but I'm not sure what. It's testing 0 ammonia (but....with a full fish load there probably was a minispike of some kind, although probably undetectable). Should I scrape it off or leave it alone?

 

I might try that. The glass is very translucent even now, it seems that the algae started up quickly after I added the fish and then slowed down or almost stopped growing, I haven't noticed any new growth in the last two days. Probably almost definitely due to a slight ammonia spike when I introduced the fish. Also I removed the filter at the same time. So I'll clean it off and see what happens.