Fish Death After Beginning Treatment For Fungal Infection

Hello!

Recently, I brought home some new fish from PetsMart (3 female mickey mouse platies and one zebra danio). I do not have a quarantine tank due to policies where I live. A few days after introducing the new fish, I noticed a fuzzy, white spot on the mouth of one of the platies. I began treatment last night for a fungal infection. I woke up this morning to find both the affected fish and a second platy dead (both were new). One was floating up top and one was upside down on the bottom. The tank is 10 gallons and I followed instructions for dosage on a bottle of API PIMAFIX that I purchased from Petco. None of the remaining fish (5 Zebra Danios, 2 spotted Cory Cats, and 3 platies) appear affected. I now have the following questions:

1. Is the API PIMAFIX, possibly the cause?
2. Do I discontinue treatment of the tank as a whole since the affected fish has died?
3. If I discontinue treatment, do I go beyond the standard water change (cleaning decorations, heater, etc.)? I cleaned the tank and did a 25% water change several days before adding the new fish.
4. How can I quarantine fish in the future if I am not allowed a second tank?

Thanks in advance!

 

Some times no matter what you do new fish die. Any container can be used as a qt tank.

 

Does anyone know of a way to treat fungal infections that actually works. This is day 4 using PIMAFIX to treat the tank and it has not helped. I have followed the directions for my 10 gal. The oldest resident (red mickey mouse platy) of my tank was found dead this morning and a zebra danio is showing definite signs of a fungal infection that popped up overnight. Based on how quickly it progressed before, he won't last the day. Prior to this, the deaths were fish that had been added about a week prior.

 

back in the day aquarium salt was a treatment. I somehow think your issue could be water quality or stock

 

I haven't tried salt yet, but will give it a try. There isn't any in my tank at the moment. Isn't salt detrimental to cory cats though?

 

Rapid deaths combined with fuzzy white spots sounds like columnaris.

Columnaris Symptoms And Treatment

 

I haven't tried salt yet, but will give it a try. There isn't any in my tank at the moment. Isn't salt detrimental to cory cats though?

yep , do your research. Have your water chem tested at petsmart first.