This guy gave me 2 dovii cichlids and one is probably a male he has nice blue coloration in fins and is around 4inchs and the other one no idea I wanted to keep them in a 55 gallon or bigger tank probably a 75 and wanted to know how long I could keep them for and could i keep them with oscars and silver dollars now as they are small I know when they get bigger of course they will probably kill everything but wanted to know and how to care for them