That’s because you don’t have a purple in that mix - or at least mine…I’m surprised to hear how many people wouldn’t keep tangs for aggression/disease reasons? I currently have 6 tangs in my 220 and I’ve never had one issue with any of them.. all introduced at separate times too..
2 yellow 1 D. Sailfin 1 PBrown 1 Hippo 1 Gem