I think that I may have killed a couple of them myself.
I siphon the dead bodies out with a hose and tube. After I looked in the glass, I saw that I had actually sucked up a couple of live ones that had just been lying on the ground. (I don't think gettting sucked up thru a tube did them any good)
Like I said though, I had expected to lose them as most of them had been just lying around on the ground for a few days. The others are generally swimming around with the current during the day. The only time they lie on the ground generally are when the lights are off.
I think though that naturally there will be some that just don't make it.
I am sure that there are lots in the wild that die off just for whatever reason besides being lunch for something.
I don't notice them scratching though much, which means the ammonia isn't high.
I dunno
I am still happy with my results.
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Way too much time and money has gone into this hobby....and yet, I CAN'T STOP
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