Salt and Carbonated Water for Hydra Eradication?

[Red Bee Shrimp Fan]

It has come to my attention that hydra are NOT fond of salt. Does anyone have a dosing suggestion to eradicate hydra in a tank? Suggestions would be very welcomed. I could remove the inhabitants, dose, and then return the inhabitants hydra free. I have also heard that carbonated water will also kill pest (like hydra) on aquatic plants. I was told that a 20 second dip in carbonated water will do the trick? Can anyone else confirm?

Best Regards,

Stuart

[silane]

I noticed at lower pH of a tank hydra failed to survive, so carbonated water which is much lower pH should kill them.

[starbucks]

will the salt harm the shrimps ?

[Fatcows]

Not sure if aquarium salt would hurt shrimp i would like to know also