hi, i recently brought 3 swordtails (1Male 2female).but they are sick, they stay on the bottom, and move up and down on side of glass. and have this white thread coming from their anal fin. im pretty sure it moved futher and turned into a parasite infection. because the store i got it from (petco), had a dead fish in it with them. i know its my mistake, never should of got it. but i was so adamant.
Now i know i can treat them using potassium permanganate, i got it from sears, near the dry cleaners, called "Kenmore Potassium Permanganate", it looks like little rocks. i dont have a QT yet. so i want to treat the whole tank just in case my other fish got the disease. So i have read that you should add 10mg per liter, or 2mg per liter to whole tank. i also heard anything over 2ppm potassium permanganate will kill fish.
My question is how do i know i have added 2mg per liter or 2ppm?? should i measure the little rocks and add 10mg per liter, or is it based on volume. how can i do this sucessfully to the whole tank. please answer soon
heres some pics:
Now i know i can treat them using potassium permanganate, i got it from sears, near the dry cleaners, called "Kenmore Potassium Permanganate", it looks like little rocks. i dont have a QT yet. so i want to treat the whole tank just in case my other fish got the disease. So i have read that you should add 10mg per liter, or 2mg per liter to whole tank. i also heard anything over 2ppm potassium permanganate will kill fish.
My question is how do i know i have added 2mg per liter or 2ppm?? should i measure the little rocks and add 10mg per liter, or is it based on volume. how can i do this sucessfully to the whole tank. please answer soon
heres some pics:

