Re: My new colony has died... what happened?
From all the bee poop on the top bars I would say that Nosema definitly played a role, but it can also be other things. It also looks like they had drone in burr comb between the hives, so if they had a lot of brood and a cold snap hit then they could have been too spread out to form a proper cluster trying to protect the brood and died. It could be lots of things. Pull the frames and post pics of those with the bees so we can see the cluster and post any observations. The more info the better help you will get narrowing it down.
Sorry about your loss...but yes, you can clean up the hive and start over.
Life is tough, but it's tougher when you're stupid.” John Wayne