the pinktail trigger is fine for a tank 70 gal or larger according to my books. Do you have other info. The blue throat needs a 125 gal so I agree with you there. There are many puffers in my book which are " add to reef with caution" that can be in 100 gal or less. Obviously if they are well fed they should be fine. I had a niger and a dog face in my last 120 gal reef. The diff/ besides 8 years is about 2 thousand in corals and I have done everything right and different this time. that niger and dog face never botherd any of my corals. I did not have any sps and I was young and really didn't care if they did. So, again tell me why the tank size should make a diff/ with a pink tail trigger so I can understand. I'm not shooting the messenger. Obviously my info is different from yours so please explain.