I never had 4 tangs at once. The sailfin and blue were bought when they were 1.5" and stayed with me for 3-4 months. The PBT were bought 2 weeks before I broke the tank down for upgrade. I made mistakes and impulsively bought alot of fish for the 75G. I learned my lession though (cyano) so I sold away most of the fish to local reefers and am keeping only the blue tang and my mated clown pair. Thanks for the concern though.