I finally got to put fish in my tank yesterday after letting my tank cycle for a month. I bought 2 damsels (blue & pink) in there and was planning on getting 2 more tonight. My tank is 75 gallons and since they are so small I wanted to just add 2 more. Is this a good idea? Or is 2 damsels enough? I know their aggressive so I didn't know if having 4 damsels would come back to haunt me when I add more fish in a few weeks. Thanks