Hello, long time lurker, first time poster…. Been Googling for a few days but couldn’t find any answers to my question. I have an established 17 year old 70 gallon FOWLR tank that used to house triggers, lion fishes, tangs, dwarf angels. No, not all at once, but over the course of those 17 years. 2 weeks ago I decided to trade my Hummu hummu trigger, 2 damsels and maroon clown (all have been in the tank over 5 years) in because my wife decided that she wanted a community tank. Question is , how soon and how many fishes can I add at the same time? I did 2 large water changes in those 2 weeks (50% each). Water parameters are good with the exception of nitrates (80 ppm) I’m assuming due to the carnivorous fishes I just traded in. Any info/suggestions/advice are much appreciated.