Its next to impossible to simply look at a blood parrot and determine gender. The only way to be sure is to look at the vent.
You really need at least a 300 liter (75 gallons) but a 70 gallon is better than the tank they are in now.
You really need at least a 300 liter (75 gallons) but a 70 gallon is better than the tank they are in now.