may I ask why my shrimps are committing suicide ?

I have an ADA open tank but most of the shrimps I bought like jumping out from the tank when im sleeping or either when im at work just to wake up the next morning or come back home from work knowing that their on the floor dead

the only fishes in my tank are cardinal tetras and I do not believe that it has anything to do with the fish.

or could it be that my Co2 is high because im also having a planted tank ? but if that is the case, how come there are no cardinal tetras committing suicide ?

please help and advice.

thank you.

Really ? Cardinal tetras are that kind of fishes ? I feed fish food to my fishes everyday and they still hungry to eat shrimps ?

What about others of you here ? Does you shrimps like jumping out from the aquarium ?

It so dissapoting when they die because they are nice to be kept in aquariums and are costly as well depending what type of shrimps species and grading