From a quick search on wetwebmedia, powder brown has similar difficulties to keep as powder blue. Not a very good search but the link below should give you an idea on this specie.
http://www.wetwebmedia.com/powdrbrnfaqs.htm
"- Help with Ick on a Goldrim Achilles Tang - 6/14/06
I am interested in a Goldrim achilles hybrid at the local LFS but he has bad ich. They don't seem to know very much. I suggested vitamin C and algae to feed and Kick Ick but they don't know about any of it. <I don't know that the Kick Ich is a good idea.> Would I be better off to buy it and treat it myself or let them teat it. <Your choice - one of the two ways will cost you nothing.> I guess I should ask if the fish would be better off. <Too late for that...> I think I know more than them but do you have any tips as to aid in its survival.
<You can try but when these tangs get sick for real, they rarely make a comeback. You'd have to have a large quarantine system with excellent water quality to even begin to turn this fish around. Odds are not in your favor.>
Thanks, James G.
PS. They are only asking 40 dollars so I wouldn't be out too much...
<Or... you could save your $40 for the next one that comes in healthy. Cheers, J -- >
Goldrim Tang question what? 3/27/06
Bob, <James today. Bob is in Hawaii chomping at the bit to get home.>
How are you? Love the site. <Thank you.> Wanted to ask a question about tangs.......I was wondering about the durability of the goldrim tang. Is it better than the Achilles Tang? <I would say yes.> I tried two of the achilles tangs and they both got Ich and died. <Acclimation/quarantine?> In you articles you say they are more durable than most of the tangs in this family. Also, would a Sohal tang be a better fit. I know you feel that these fish are very hardy. <Hardy for a fish in this family. Cannot compare to damsel hardiness for sure.> My tank is only 100 gallons and I have a yellow and purple tang. When I did have the Achilles tang, all three got along fine. I would love an experts advise. <I wouldn't add another tang in your 100. The tangs you have will get quite large and three will be a crowd.>
Thanks, <You're welcome. James (Salty Dog)>
Jeromy "