I got your PM, thanks for sending I don't get as much time to check this section as I used to. (excluding the Geophagus sp. 'Tapajo' in the tank with them) IMO you have
'Geophagus' crassilabris with about 70% confidence, I would be more confident in that ID if they were larger and acclimated to the tank. The adults are known for their dramatic overbite and dark colored lips. If I had to guess based off of their coloration this is their first week in the tank at about 2.5"? If they were
'Geophagus' pellegrini at this size they
should be darker with more gold/orange base color and the lips should have an iridescent blue base BUT, that depends on a lot of factors like water quality and hardness. If they were
'Geophagus' steindachneri they would be much more colorful at this size and likely have blue spangling on the flanks for the males at least.
This complex is fairly easy to ID at smaller sizes but the differences can be subtle. pellegrini can be found in the same distribution and provinces as crassilabris which I don't think many people realize which can add to further confusion. Where did you get them? What were they labeled as? Cool find no matter what they are