08-21-2011, 02:19 AM
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I suspect it was/is salt that freshwater parasites don't like,, that perhaps caused them to suddenly appear as they are being evacuated by the fish.
I might consider using an antibiotic such as Metronidazole in addition to the fungus med.
Would follow directions on medications, more is often not better.
Keep the fish warm, and change water daily while medicating.Metronidazole works best at 86 to 90 degrees and is only useful for 10 to 12 hours.
When I had occasion to use it, (with Discus) I raised temp in tank to near 90 degrees and used it at 400 to 500 mg per ten gallons with daily water change and re-dosing after water change.
Used it for ten days.
If your 75 gallon is maintained regularly,then water changes with tapwater for quarantine tank should not cause fish any problems assuming temp is close to same temp as tank.
should mention that in my view,,there is 50/50 chance when diagnosing fish ailment's that proper diagnosis is made and thus,,there is 50/50 chance that medication chosen will be effective.
I can only suggest what i would try given what has been posted.
Would also note that store bought Discus are often loaded with parasites and possible bacterial pathogens and I would reccomend that seeking a breeder of Discus to purchase them from will nearly alway's provide healthier specimens.
I wish I could be of more help and might also suggest visiting.. Simply Discus .com and pose my question's there for perhaps a better reccomendation than I can offer.
Be prepared to provide ALL info you can on water parameter's.