You can comfortably keep a pair of German Blue Rams in an ideally sized tank around 10-15 gallons. If you have a larger aquarium, it’s advisable to keep them in groups, keeping in mind they form monogamous pairs. An odd number or surplus of males might lead to disputes and stress.
Keep a single pair if your aquarium has size limitations to avoid territorial disputes or aggression. Always ensure each fish has enough room to establish its territory. Regardless of the group size, maintain optimal water conditions and balance hiding spots and swimming areas for harmonious cohabitation.