How many bloody parrot fish can I have in a 55 gallon tank?
Check out this website for stocking options http://www.aqadvisor.com
A good guideline for BPC is minimum 30g for 1 and 10g for each additional BPC. That means no more than 3 but 2 is preferred. It really depends on if you are keeping other species in there as well or just the parrots. They are cichlids so expect them to be territorial.