OK I figured out whats happening with these small tangs. its not a problem of how they were captured, I'm having difficulty feeding them enough calories to maintain their weight, while in quarantine and maintaining water quality. Just ran though 5 more small yellow tangs, only 2 are doing well. They all start out eating aggressively on dried nori, but over the past 3 weeks, I've lost 3 of them. When I examined them, the 2 remaining ones are very fat, but the other 3 seemed to have gotten thinner and thinner, till they can't even swim or stay upright. They didn't take to mysis, and I did feed them what fresh red gracias algae I have, but I simply can't maintain their body weight. the last one to die, was eating the fresh gracias, right till he tipped over and stopped eating, after which he lived another 2 days, thin as a rake.
So in regards to maintaining calories, I recalled many rabbits, I've had in the past that were also eating aggressively on hair algae, but "starved" will full bellies, but no muscle mass. In hindsight, the hair algae I was feeding him didn't have enough calories.
So, as of now, the problem with these small tangs, is that they are not adapting to food fast enough, before they keel over. which means I have to rethink my feeding regiment and flip them to high protein mysis as fast as I can, which is a problem in itself. Looking at the mysis out there, San Francisco brand has only 5% protein, which I passed on. Hikari, which I'm using is at 10% and of course there's PE mysis at 70%, which is probably what I should be using from now on. Does this mean, in the future I shouldn't be using dried nori at all and stick to PE mysis? I've purchased a pack of frozen San Francisco brand formula B, but they definitely do not recognize that as food.
Thoughts/feedback on how you get your tangs to eat while in quarantine? My process seems flawed, given my results.