Miss Wiggle
Practically perfect in every way
ok that sounds better, should still try to get a proper ID for them as they may turn out to be too big long term in which case it would be better to return them to the lfs now before you've got too attached to them.
i would suggest your friend may need to have them for more than a few weeks though
what you need to do now is daily monitoring and water changes to keep ammonia and nitrite below 0.25ppm. Once they both hold steady at 0 without daily water changes you should leave it minimum of two weeks if not longer then just add one of the plecs, again same process of testing and water changes, when stats level out leave it minimum another 2 weeks preferably 4 and then add the other plec back in.

i would suggest your friend may need to have them for more than a few weeks though

what you need to do now is daily monitoring and water changes to keep ammonia and nitrite below 0.25ppm. Once they both hold steady at 0 without daily water changes you should leave it minimum of two weeks if not longer then just add one of the plecs, again same process of testing and water changes, when stats level out leave it minimum another 2 weeks preferably 4 and then add the other plec back in.