The big girl seems to be breathing ok. normally I test their cups for ammonia but i lost the stupid test tube so neither of those girls water got tested. I'm just gonna assume caroline's was horrible as all the ones i have from petco had at least a 2.0 Not sure about the walmart one though. Tauski had fin rot but had 0 ammonia. I actually think they are shipped to walmart in bad condition.
Ohmigosh! Your new girls are incredible because the Wal-Mart girl is so big and Caroline is so small! All the girls at my Wal-Mart as that big and blah, too. I'm not 100% sure but I think you may be right that Wal-Mart girl has ammonia burns on her gills. How is her breathing? Caroline is cute, so tiny! What a find.