Hello I am receiving a purple tang a powder blue tang and a Coris wrasse today. I have a 20 gallon set up and will start TTM as my display is going fallow. I set up the 20 gal last night salt was well mixed for over 24 hrs. All I have in the tank is a air stone and a heater and egg crate lid. Should input a tank divider in to seperate tha tangs. Also If you have any suggestions PLZ plz help me. Thanks a lot reef central.