I am growing out some flowerhorns, red texas, argenteas, ebjd.s, etc...
All are 1-2".
How many full sized adults can a safely fit in my 110 gallon tank?
That will be mostly dependent on the sex and/or individual temperment of the fish.
1 male FH & 1 male argentea, I don't see that ever happening in a 110 gallon tank.
depends on surface area, thats what ultimately decides how many fish you can keep, Usually 1 inch per gallon is the number but with cichlids its much less due to territorial behavior....Make sure never to over feed and to have many hiding places for the fish..