well since you seem to be set on salvini go for it and soon you will only have one salvini in too small of a tank. any cryptoheros or thorichthys species should be good in that size tank. I love when people ask for advice and then shoot down any they get and do what they want. why come here then?
Im sorry you were offended by my response in no way am I shooting anyone down. However, I am not obligated to take someones advice on species selection if it is not a species I am interested in. In case you have not read any further you may like to know I currently have a 90 and 125 unoccupied so the tank size is hardly a concern. I was merely uneducated as to the final adult size of these fish until I did further research so I thought they may be possible in this smaller tank. this tank is a difficult footprint to work with as far as livestock I am interested in. I like the idea of the thorichthys meeki for this tank and am curious how many individuals would be safe to keep in this footprint. I appreciate your input but in the future you may want to employ less of a hair trigger. I am relatively new to the hobby and still learning but in no way am I an idiot and I certainly won't be spoken to as so. Thanks for your consideration in the future. I hope you will continue to offer advice in a more constructive manner.
So I would love to hear any other suggestions to the OP.