I also tend to love hard to keep fish but there are some that I try very hard to resist buying due to past negative experiences or just from knowing how poorly they have faired for others.
I was recently tempted to keep a Moorish Idol but decided against it because of my high fish bioload and the fact that my largest tank is now "only" a 165g and not the 220g I used to have.
I think both Moorish Idols and Achilles tangs need extremely high flow/highly oxygenated water to thrive and personally, if I had one of these hard to keep fish doing well in my tank, I'd try my best to have it as the last fish I add to that system. I would also never shut off my skimmer for more than a few minutes to clean it or reduce the flow. Would I like to know if flow/high O2 levels are really essential to keeping these fish alive? Yes. Would I risk them to prove or disprove that theory? Never.
Anthony
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If you see it, can take care of it, better get it or put it on hold. Otherwise, it'll be gone & you'll regret it!
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