hairy

Very new to saltwater tanks. I have a few things growing on my live rock and was hoping someone could identify it for me. New tank 1 month old, 10g nano tank. Test results have all been good and within the recommended levels. See images of growth attached. Also noticed a bunch of clear looking...

I know it was started to grow in my tank few weeks ago when i did the maintenance, now yesterday when i actually turned on full light (usually mine are dark blue all time) i could notice the worst green hairy alage all over the rocks (1" long), many covering some portions of SPS, many on other...