He's yours and if he is to not survive, then so be it. Maybe RG's don't need H/S. Far be it for me to advise you, but don't let this be your last Chronicle. Have you used H/S on all of your RG's? Maybe anticipating something that may happen to your fish, may not happen. You are much more experienced than I but if something ain't working then change it.
I wish you and your RG the best.
Steve