120 Gallon Tank 2 of my albino corydoras died. Help!

Hello everyone, I'm new here! Yesterday I introduced 3 new albino corydoras to my tank and this morning 2 of them died. Both had bites on their fins and one of them was bent out of shape

Here's what I have in my tank currently:
Neon tetras
Glo tetras
Guppies
Kuhli loaches
Hillstream loaches
Panda corys
Otocinclus
Amano shrimps (they're huge)
Cherry shrimps
Yellow goldenback shrimps
Blue dream shrimps
Rabbit snail
Nerite snails

I've read that guppies or shrimps could be the possible culprit while the albino corydoras are resting. But the rest of the panda corys I had for quite a while were fine the whole time? Idk what happened, my albino corys are so gentle they don't deserve this!

 

Guppies and shrimp aren't culprit for sure.

I guess they had issues to adapt to your tankwater or they caught an issue earlier in the LFS-tank (ragged fins sounds like nitrites / pollution).

 

New fish can carry a whole host of diseases and parasites, that's what quarantine is for. Any losses within the first days after purchase are either on things they contracted before or problems acclimating to your water.
So the only mistake might have been either buying them although they looked not completely healthy or not quarantining, but otherwise you're not to blame.

 

How did you acclimatize them to your tank? I ask because Corys can be very sensitive to parameter changes; something I learnt when I introduced my Corys, following advice from my LFS, and losing four.

 

I lost 2 corys in very similar situation. The Tetras will get most of the food before it reaches the bottom and the other shrimp and corys will be on anything else. They may have starved. Once they die the snails and shrimp will start eating them and make the bodies look deformed.

 

I lost 2 corys in very similar situation. The Tetras will get most of the food before it reaches the bottom and the other shrimp and corys will be on anything else. They may have starved. Once they die the snails and shrimp will start eating them and make the bodies look deformed.

The OP lost the Cories in the first night after purchase. I doubt they starved within that short time.