The most important part of the below is the last sentence.
Mainous, M.E., Kuhn, D.D. and Smith, S.A., 2012. Efficacy of common aquaculture compounds for disinfection of Flavobacterium columnare and F. psychrophilum. Journal of Applied Aquaculture
and F. psychrophilum
are important pathogens of the aquaculture industry, and thus disinfection of aquaculture systems and equipment is essential for disease control. This study examined commercially available compounds in vitro
for their ability to eliminate these two species of Flavobacterium
from the water. The compounds evaluated included Clorox, ethanol, Roccal, Lysol, iodine, formalin, Chloramine-T, glutaraldehyde, potassium permanganate, sodium chloride, and Virkon Aquatic. In this study, 70% ethanol, 50% ethanol, Clorox, Roccal, Lysol, iodine, glutaraldehyde, Chloramine-T, and Virkon Aquatic reduced the number of bacteria of both species to zero within one minute of contact time. Formalin and 30% ethanol also killed both species of bacteria, but required a longer contact time. Potassium permanganate killed F. columnare
within one minute, but did not reduce the numbers of F. psychrophilum
even after one hour of contact time. Sodium chloride was not effective.
However, I can also post research that the amount of salt you are using can work well as a dip. "Nine groups were treated with 1.0, 2.0 and 3.0% NaCl for 5, 10 and 30 min each." and "Since short duration sodium chloride bath was found to be effective in the control of columnaris disease, 1% salt disinfection of fry and fingerling stock for 30 min could be incorporated into routine management in catfish hatchery"
Most bacteria dislike cooler temps. This why operating rooms are so cold. So if you can lower the temp. that whould do something to slow the bacteria until you get the meds. However, you should not lower it below the lowest acceptable temp. for whatever species you keep which has the highest low temp. range.