Join Date: Apr 2014
Location: Cleveland Ohio area
I dealt with this a few weeks ago. I had a tank with 50 fish and 8 snails. Only 2 fish, 3 plecos and 7 snails survived.
I treated with Kanaplex for 8 days. If you lost all fish, you MUST sanitize the tank before adding more fish or ALL new fish will die again. Is SEVERELY contagious.
Take everything out of the tank EXCEPT substrate, heater, filter and fake plants/plastic decorations. Turn off heater. Discard media in filter(but leave filter going).
Do a 99% water change. add aprox 1C bleach per 15 gallons. Let sit for 4-10 hours(while your at work or such). 99% water change 2x. then add declorinator. I use pond stuff. Let sit for an hour.
Disinfect plants. I used H2O2 double concentration, double recommended time. Then disinfect with bleach. Double both again. You will have some live plants die. Oh well, better than more fish.
Boil the snot out of and real wood. Hours. Turn wood. Add water as needed. At least a few hours, depending on wood size. If wood wont fit in a pot, leave it in the tank, but bleach 24 hours instead of 4-10. Must remove wood before declorinating water. Submerge wood in a bucket outside, change water every few hours. after 24 hours, remove wood. Let it sit for a few days in the sun. To get it to sink again just boil it one more time and let it cool in the pot water. Then add to tank.
Anytime you get new USED wood, boil it first.
QT any new fish.
Use regular H2O2 bath for any new plants. USe it on snail shell, apply with a tooth brush GENTLY. Do not get on inside of shell. Do not salt snails.Snails dont 'get' columnaris but they can carry it. Same with shrimp.
A(t least one) pleco in every tank.