carlrs wrote:
SS wrote:

Thanks for the info, I never knew about internal columnaris. The deaths
spread like wildfire, a matter of hours. They started getting white
areas that just kept growing until it covered all transparent areas on
the fish. Also lost one z.danio. Can anyone recommend a gram-negative
antibiotic? Most of the stuff I've seen is gram-positive.

Nitrofurazone and Kanamycin Sulfate are an excellent combination for
columnaris also known as flexibacter. Pimafix has also been shown to be
extremely effective for this and is non antibiotic.
Here is a site that lists many antibiotics and wheter they are gram
negative or positive and what they are effective against.
http://aquarium-medictions.blogspot.com/

Carl

Great site! Thanks Carl!

SS