Okay, so I understand everyone isn’t going to be saying sunshine and daisies but I’ve plucked the courage for help. I have a 3ft wide, 2 ft deep 2ft tall tank about 400l ish including sump I believe. I have a scopas tang that’s been in the tank for a month or two, and I had every intention of adding a yellow tang same time, prices of the tang shot up forcing me to save, I’ve finally bought a yellow and introduced it and the inevitable aggro has begun, the scopas was aggressive and yellow holds his own. Lights out and they ‘lost’ eachother and only when they find eachother they will attack... does this settle? And after how long? And is this tank too small?? Tang police imbound