Magnified pictures?

[sharuq1]

I am having trouble identifying a couple of creatures I have found recently in my tank and I am not convinced yet they are bad as I have seen no damage on anything, however to play it safe I asked someone to lend me their microscope for a couple days. Unfortunately, I have no reference for magnified creatures, so I don't even know what I am looking at. Does anyone have a link to pages of very small/magnified hitchikers/pods/worms/chitons (critters 4mm and under)