Hello,
I’m going to be honest, so please don’t think I’m being harsh. 5-6 days with out light isn’t good. You know the answer as well as all of us, it’s a good chance they can and or will die. Im not certain if you can order a new light and have it over nighted to your home. If so then have fish sitter set the light up. I’m not saying by another hydra, but you could be a fluval marine 2.0 light that would work long enough for your coral not to die. I ran two of those on my 125 and they were more than good enough to grow anything.
Honestly if it was me, and I am only speaking of me, I would be heading home. I have too much time and money into my tank. Plus as their caregiver to my fish and corals, well they are like my children. If it was 24 hours things would be different, but 6-7 days is more than likely depending when they send it out, if there is a weekend etc.
I know my answer it not what you want to hear, but it’s honest. Having no light, heat, and flow is huge huge to any coral. I wish you luck, if you were in Boise I’d loan one of my fluvals to you, maybe check and see if anyone you know has a saltwater tank, and or spare light. I would also call your lfs to maybe borrow one of their used lights, also pertco, and pet smart may have back up lights. You could also try your local aquarium as well. When I lost a light do to a bad power supply they loaned me one of theirs. Just some possible ideas.
