Happy days, after going through all my boxes, i found a Tetra 6 in 1 strip test, not the most reliable.. But that shows safe on all parameters. pH, KH, GH, NO2, NO3, CI2... So water ai t seem to be a problem. I did read a comment on board site that the grey color under the jaw line and down towards their yellow'ish belly, is sign of stress?... Also they have this grey sort of grey line, under their eye. Does it ring any bells for you guys? I got no clue, these are my first puffers, just hope it aint some fungues, parasite thing.