I bought just a small amount of bloodworms. I just want to try them out. But I didn't feed them immediately and rather I put them in a jar (with lid). Just dicided to feed them to the fishes after a couple of days but the water inside the jar turns darker and when I open the it, it reeks so bad that I decided to close the jar immediately and put it away thinking that they might be harmful for the fishes already. And here I thought they be just fine in a watered jar as they are water dwelling larvae but they all probably just died (probably because of lack of oxygen). Are they really dead? Are they really not fit to be feed to the fishes? Can I really stack bloodworms or do I really have to feed them to the fishes right after I bought them? If they can be stack, how do I do it properly? Thanks..