Sorry i haven't been on the forum lately, but I do have an update, and what I hope is the end of this madness. So this is the state of my tank now, the black angelfish died earlier today, and yesterday another harlequin died. It seems like the infection is dieing down though, the only fish that shows symptoms of it still is the other angelfish, but they are just small white splotches on his fin right now, they are not progressing, and he is still acting healthy. I did some research of my own, because obviously the Tetracycline wasn't working, turns out it is mainly a gram-positive antibiotic, whereas Columnaris is gram-negative. According to this website: (
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/www.americanaquariumproducts.com/Columnaris.html"]http
/www.americanaquariumproducts.com/Columnaris.html[/URL]" target="_blank">
[URL="http
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/www.americanaquariumproducts.com/Columnaris.html[/URL]</a> ) the best antibiotic to treat it with would be a mix of Kanamycin (Kanaplex) and Nirofurazone (Furan-2, Furanase) or Minocycline (Maracyn 2). I will be going to the pet store again, hopefully I will be able to find some Kanamycin, but it seems very rare to find (even on the internet) so I will probably have to settle for the Maracyn 2
So assuming that everything goes according to plan, and the fish heal up, this columnaris will bring my fish total from 20 to 10 in my 29 gallon tank. This is the first time I've had to deal with any serious infection, I've had the 29 gallon for 2 years now, and have prided myself on having good maintenence of the tank, It was unfortunate that it had to end up this way, especially with the death of the black angelfish who I've only had for about a month, but have grown attached to.
Before the infection I had:
10 Harlequin Rasboras
4 Kuhli Loaches
4 Cherry Barbs
2 Angelfish
After the infection:
1 Harlequin Rasbora (as you can see these guys took the brunt of it)
4 Kuhli Loaches
4 Cherry Barbs
1 Angelfish
I just have a few questions though:
Should I add half dose of antibiotics (Kanamycin and Furan or Maracyn 2) because of the loaches?
How long before I can get another black angelfish and restock the harlequins?
Will either antibiotic kill the filter bacteria? and if so, would a good way to keep some be taking some filter foam from the tank and keeping it in an aerated 1 gallon bucket, adding ammonia once in a while? Or will that also keep some columnaris alive?
So

to the 10 fish that died in the first tank infection i've had.