FWIW, I had a 4" blue linckia in my Solana for nearly a year before moving it to my 300 gallon setup. It was a hitchhiker; got maybe an hour of acclimation, was exposed to air - in short, everything these guys aren't supposed to tolerate.
The thing is still happy and healthy as far as I can tell. Life in a 34 gallon tank may not be ideal, but it's not a death sentence either.