Man, I just looked at that website, holy crap! They have several tangs listed as min. of 20 gallon tanks. Thats insane, I havent seen a site that has a min. listing of 100 for most tangs. My friends dad has 2 tangs, a yellow and a blue of some sort (but not a blue tang, some wierd name) in his 75 with 6 or so other fish. He's had his tank for 15 years and hasnt had any problems with them. He thought I could house a smaller tang in my tank, just wondering what you guys think? I really like the yellow tang he had, it was cool watching them peck at the lettuce he put on a clip in the tank. He did say his blue tang got some sort of parasite or ick some times, but his cleaner shrimp pick it off for them.