The fish in my tank, oscar, jd, and convict, plus some pictus (80 gallon tank) are all showing some varying degree of fin rot. What medications do you think I should use, becuase it seems like even if I buy a package of medicine like maracyn 2, it will cost me 20$, and I'll only get a single use instead of like 5 since my tank is 80 gallons. Any recogmendations? thanks...
