I was reading on a page that 1% salinity will kill any strain of columnaris. and that 0.5% will take most of them. So the question is like in the title.
How long can a discus survive in 1% salinity and alsp 0.5%.
I know discus cant take salt in long term. but what is considered long or short except for a dip.
Also a forum user called miamiheat used a big consentration, but no information on how succesfull it was.
These links maybe not answer your specific questions but give you an idea on using salt
http://forum.simplydiscus.com/showth...lt-A-basic-FAQ
This is a least give you an upper limit and duration.
http://forum.simplydiscus.com/showth...-Do-a-Salt-Dip
Your discus are talking to you....are you listening