About a week back, my 24 x 12 x 12 community tank was going through 'rough waters'. Unfortunately, I also lost a few inhabitants. My fish, mostly my panda cory cats, celestial pearl danios, neon tetras and furcatas had a white patch around the dorsal fin and their gills were overly red. The culprit, i found was 'columnaris'. Now, let me also tell you more about my tank. Other than the fishes I mentioned, I have a couple of apple snails and corydoras habrosas. The only live plants I have are floating water lettuce. The hardscape is quite simple with sand, bogwood and a couple of terminalia catappa leaves. My filtration is also pretty simple. I have a basic internal sponge-type filter and a DIY fluidized sand bed biological filter (made from an old tetra bits empty can. I usually do weekly 50% changes but this disaster struck me mid-week and that too amidst pressing deadlines at work and both daughters down with the viral. Luckily, I have a doctor father-in-law
. I told him about columnaris and I guess he did his own research. He asked me to powder 2 metrogyl tablets, which is basically 800 mg of metronidazole and mix 3 parts of it with 1 part aquarium salt and put it in the tank for five days.
It was miraculous to see most of my fish recover. They're pretty fine now. In fact, they're doing great. What I did further was change the sand. I mixed new sand with some tempered sand I had in another tank so that it wouldn't tamper with the cycling and parameters too much. All in all, other than the 5 fatalities, things are looking good. Wanted to share it with you guys.
“I am like the fish in the aquarium, thinking in a different language, adapting to a life that’s not my natural habitat. I am the people in the other cars, each with his or her own story, but passing too quickly to be noticed or understood.”
- David Levithan (Every Day - 2012)