Steve, what do think is a good vitimin or supplement for tangs?
The only greens my tangs like is romaine! And yes, I've tried the seaweed [nori], broccoli and even carrots and peas! LOL
To respond to the post...go for the green veggies, weather its frozen, flaked or live. Tangs must have this. And, since they are grazers, you need to get a lettuce clip and use it for lettuce or seaweed. Tangs are not happy unless they can pick at something every waking moment.