Restocking 40 gallon after mass die off

So an update, it does seem like it was an ammonia spike that happened that killed my fish, it's the only thing that makes much sense to me given the circumstances. But even now over 2 weeks later i'm still losing fish, is that normal? Are the fish that are left just permanently damaged to the point where they won't recover from it?
 
Yes, ammonia can permanently damage fish. Often it's the gills, do (did) your fish have red gills? Fins can be hurt too but not often fatally unless the fish can't swim. There may be other damage that occurs too, I don't know.

I'm sorry you're still losing fish, this has been an ordeal for you. I hope it ends soon.
 
Yes, ammonia can permanently damage fish. Often it's the gills, do (did) your fish have red gills? Fins can be hurt too but not often fatally unless the fish can't swim. There may be other damage that occurs too, I don't know.

I'm sorry you're still losing fish, this has been an ordeal for you. I hope it ends soon.

I didn't see it in the fins much but the gills were bright red and there were red streaks on the bodies of a couple. Is this tank going to be ok for the new fish i get (after quarantine of course)? Like this is just the result of the initial damage and not something that will linger and affect future fish?

The thing that surprises me is that the one amano shrimp that's been in there from the beginning is still doing great, even better now since i actually seem him out and about now. Aren't shrimp supposed to be one of the first ones to go when water goes bad? Or are amanos just hardier than others?
 
What are your current tank readings?
 
What are your current tank readings?
It looks like about zero for ammonia nitrite and nitrate. I feel like the nitrate is super low because i did a water change a few days ago and i just don't have that many fish in there anymore. What little nitrate is left might be getting absorbed by the plants too right?
 
Correct.
 
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