20 20: If it doesn't blow off, I doubt it's dinos. It is probably just nuisance algae and the fix for that can be very different than the fix for dinos, although I have red that increased pH can help with some algaes. If it is back when you get home, I take that all back!
law086: Looks like you got 'em dude. Read the article linked above by Randy. Try testing for silicates as well. I would stop doing water changes and swap out carbon every 3 - 4 days. Try the lights out too. This seems to lower the dinos ability to multiply so that when you attack them, they can't come back as strong.