Update on my 3 survivors:
As of last night, i finally saw all three of them "schooling" - swimming together... i was very happy to see that.
i saw that 2 of them were looking like they were foraging for food so i fed them some food - the water temp was above 60 as the air temp was about 72... they seemed disinterested at first... just sitting there...
so i gave in and walked away - i am able to see the pond from my kitchen so i was able to see them begin to eat after about 5 minutes - then we took a seat close to the pond - ducking down as we reached the pond so as not to scare them
they were definitely hungry - they had finished off the food and were still looking... i wanted to feed them again but decided enough for one day... i'll feed them again tomorrow.
I am so glad that all three were out and about and seemed to be swimming quite well - i think i have a couple of comets and a koi - the comets seem to be more energetic but the koi was still swimming with them, just at its own pace...
probably need to identify them at some point - but for now i am just happy to see them again after almost 3 weeks of uncertainty.