Bloodworm kills tetra

I don't thaw frozen food when I put it in the tank. I scrape small bits out of the cube with a tiny scoop, and drop it right in the tank. It seems to defrost almost instantly. Is this bad? :confused:
 
I haven't had a problem with it being frozen in the past... In this recent case it was thawed in a cup of water so I could distribute it better.
 
hmmm... my neons HATE bloodworms! wont even go near them. maybe they no something that yours didnt :joke:
 
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