Injured fin on new baby Black Ghost Knife--Help please

rosita

Here
Jan 11, 2006
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0
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Cape Fear River Basin
I'm not sure if this is the right forum for knifefish, but I didn't see another that would fit.
6 days ago I found a lovely little 5 inch black ghost knifefish. He looked very healthy and active--I watched him for quite a while, and fell in love with him. What a cool fish. I have him in an established 5 gallon while I finish cycling my new 55g. There are 2 silk plants and a resin cave rock for hiding. Tonight after I did water change (50%) and gravel vac (I've been feeding him small amounts of frozen bloodworms, and freeze-dried brine shrimp, and granules, which leave a mess if he doesn't eat it all--thank god for turkey basters, too!!) I noticed he was moving more strangely than normal. As I looked more closely I realized one of his fins was almost completely gone--there's a little stub like "Nemo"'s special fin. A nubbin.
Tonite's water params were:
 
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