It's not just lack of knowledge, a lfs near me that I know a few of the staff have been keeping and trading fish for a long time had a little 3" RTC and I have never seen anything like it! The thickest part of its body just behind its head was about the with of a pencil and you could see every indent of the poor things skull, I really was like looking at a skeleton covered in skin, needless to say I don't purchase anything from there anymore
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Scoop it out with your hand and throw it in the feeder tank. I've seen it done before.