I'm a bit more conservative than most about what I would put in a 75 long term.
I go by the rule, for every inch of adult cichlid, a minimum of 10 gallons is required.
So in a 75 gal no cichlid that grows larger the 7.5".
For me......This eliminates, the Andinoacara (GT) clade, Rocio (JDs) and even some Thorichthys (I've seen 10+" FMs).
I've seen all of the above hit 10", but a 75 would work as a temporary grow out.
Many of the Amatitlania, Ctyptoheros, Panamaeus, or Herotilpia would work though, in my opinion as pairs in a 75.



Cryptoheros rytteri left...................Amatitlania myrnae, middle............................Panameus panamense right
Below left Herotilapia multispinissa..........Middle Amatitlania nanoluteus..............right, Amatitlania sp Honduran Red point



And with all the above, large wild type and geographically correct swordtails. would be my choice of dither fish (at least temporarily .



as would some of the geographically correct Central American Gambusia or large Poecilia species


y
I go by the rule, for every inch of adult cichlid, a minimum of 10 gallons is required.
So in a 75 gal no cichlid that grows larger the 7.5".
For me......This eliminates, the Andinoacara (GT) clade, Rocio (JDs) and even some Thorichthys (I've seen 10+" FMs).
I've seen all of the above hit 10", but a 75 would work as a temporary grow out.
Many of the Amatitlania, Ctyptoheros, Panamaeus, or Herotilpia would work though, in my opinion as pairs in a 75.



Cryptoheros rytteri left...................Amatitlania myrnae, middle............................Panameus panamense right
Below left Herotilapia multispinissa..........Middle Amatitlania nanoluteus..............right, Amatitlania sp Honduran Red point



And with all the above, large wild type and geographically correct swordtails. would be my choice of dither fish (at least temporarily .



as would some of the geographically correct Central American Gambusia or large Poecilia species


y