Lionfish Question

Hello
My 2'' dwarf zebra lionfish isn't looking so hot as of late. Ive had him for about a month and since then he seems to be looking weird. First he had some blotchy fading parts on his body, just looked like a patch of skin turning a little white. It seemed to clear up after a while but it came back about a week ago, its starting to look better now but I just wanted some ideas what it could be. He also has a little cut/scrape on his side that hes had since I got him, what can I do to help this heal?
Now for the real reason I'm writing. Over the past week it looks like one of his fins has started to turn white and is looking a little ragged. Its the fin near his tail...you know how they have the tail fin and then the two others one on the top and one on the bottom (sorry for that). Well the one on the top is exhibiting these symptoms. It doesn't seem to be bothering it, he still eats and swims around him but Im a little worried. Any Ideas what this might be? Fin rot perhaps?
Ammonia: 0
Nitrates: maybe like 10, I haven't water changed in a while.
Nitrites:0
Ph:8
Temp: 80 degrees
Tank Mates
1 Valentini Puffer - He doesn't bother the Lionfish
1 Blue Devil Damsel - Doesn't bother him either
Thanks
 
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