Calculated risk: A chance taken after careful estimation of the probable outcome.
Fish had a low chance of living in QT. It was already withdrawn and eating little, and thin.
My tank is healthy and I fear not ICK. Worst case scenario I lose the fish and $225 dollars in other fish.
Decided $275 in fish was an acceptable loss value.
Fish is now well on it's way to obesity.
I am rolling with a laissez–faire strategy for my tank. I accept that it was a risk, I rolled the dice. Knowing the likely outcome as well as the worst case outcome. My tank is two clown fish away from fully stocked, but even if all my fish died tomorrow it would have minimal impact on where I want my tank to be in 6 months, as this is a reef tank first, and a fish tank second.
Before I started my reef tank I made a decision. Corals are my primary purpose of the tank, fish are a nice bonus. I read a great article about reefing forget by who before I started. Essentially it said every reefer needed to make a choice before they ever started the hobby, do they want fish or do they want corals. Doesn't mean you can't have both, but when it comes down to it if you had to decide who lived and died you better be ready to make the decision without question.
Note: I do have a QT I am not crazy. I chose not to use it. ICK aint scary enough for me to worry about, but more importantly the fish would probably be in worse shape from the experience if not dead. I am not saying this is what you should do, if a fish gets an ick outbreak in your tank, getting it out is probably best as something caused it in the tank, and until that is addressed it is less safe.