Help with 1 week old 10g nano

[Nixon]

i can only spot 2 on the same rock. and i've been reading a lot of mixed comments about them. some people are saying they die off after awhile. others say they sting everything even you and leave rashes/swelling. some others say they have them and they don't bother anything in their tank...maybe i'll get a buddy to touch it and see what happens haha. i dont know what i want to do with it yet. thanks for that link though. some good reading. any other suggestions guys?