I see your point. How high is the nitrate? I suppose though if the RO water and buffer method worked properly for you, at least keep the hardness levels no lower than 150 ppm. Is that where your hardness level is currently?
As for the filter, your best bet is get a new Aquaclear and then "borrow" the established media from your other tanks. Replace what was "borrowed" with fresh new ones. Retain most of it though or you'll find cycle bumps in your other tanks instead.
Metronidazole or Baytril are pretty much the ones that could effectively lift off the dropsy in some cases although there is no 100% guarantee for that especially with full blown cases involving renal failure.
What other antibiotics do you have access to? If you can find antibiotics in petstores, could you please list down the ingredients? I am aware that unfortunately, most companies seem to refuse disclosing the ingredients. Waterborne treatments are only effective if they are effectively absorbed by the fish. Most meds especially with salt contraindicate with the antibiotics used.
As for the filter, your best bet is get a new Aquaclear and then "borrow" the established media from your other tanks. Replace what was "borrowed" with fresh new ones. Retain most of it though or you'll find cycle bumps in your other tanks instead.
Metronidazole or Baytril are pretty much the ones that could effectively lift off the dropsy in some cases although there is no 100% guarantee for that especially with full blown cases involving renal failure.
What other antibiotics do you have access to? If you can find antibiotics in petstores, could you please list down the ingredients? I am aware that unfortunately, most companies seem to refuse disclosing the ingredients. Waterborne treatments are only effective if they are effectively absorbed by the fish. Most meds especially with salt contraindicate with the antibiotics used.