How much bank balance is required for Spain?

Could you please elaborate on the question, "How much bank balance is required for Spain?"? Are you inquiring about the minimum balance required to open a bank account in Spain? Or are you asking about the amount of funds one should have in their bank account to live comfortably in Spain? Additionally, is there a specific type of bank account or financial institution you're interested in? Your clarification would greatly assist me in providing a more accurate and informative response. Thank you.