villandra

I have tetras with columnaris, and the instructions that come with the antibiotics are as clear as mud.

Using Aquarium Pharmaceuticals bifuran. Also picked up some maracyn1 and maracyn2. Haven't actually used any of this in the tank.

Have Penguin filter with biowheel, still trying to cycle it. Ammonia and nitrite levels are higher; nitrite higher than ammonia, Nitrates 5.0. don't want to kill the biofilter.

Which of these drugs will harm the biofilter? Getting completely different instructions.

Instructions with bifuran say to completely change water each day and add fresh dose each day.

Exactly how much water do I really change each day, and how much bifuran do I really add each day?

What about with maracyn and maracyn 2?

Thanks!

Yours,
Dora

Chief_waterchanger

I am not familiar with having to use medications because it is rare for my fish to be sick, but what I can help with is this:

You should not have fish in a tank before its cycled, but since you do have fish in there you need to be doing large (50%) waterchanges every day or two. It will prolong the setting up of the good bacteria (cycle), but it should help your fish's health, which is the most important thing.

I'm sure someone with experience using the medications you are asking about will be around as soon as they can.

Good luck.

COBettaCouple

I haven't used those much and never used BiFuran. From what I hear, it's typical to use a half-dose of the Furan products.

I use Triple Sulfa to treat columnaris and it doesn't harm the biological filter. It's pretty easy to use and has always had good results for us.