Skimmer2 stated "I forgot, they do not seem to be afraid of the light of the flashlight."
So you are able to see them on the glass when the lights are on? If so, this is not typical of the cirolanid. It is typical of the Sphaeromatidae. The ones I have attach to any algae that may be on the glass. They are there even when my MHs are on. I had the same in my old tank my my six-line wrasse wiped out most of the population. In addition, I am still not convinced that these are cirolanids based on the pics that Skimmer2 posted. Take note that the eyes of the isopod are smaller and spread farther apart. Cirolanids have larger eyes that sit closer together and are positioned higher on the front of the body. It looks like there isn't any fish in the tank yet, so you won't know for certain if they are attached to the specimen after the lights go out. Definately think about purchasing a red light from the sporting good section.
IMO it is nothing to be stressed about. Good luck with the tank, I like the stand and canopy design.