Nitrafurazone is easily found here in the US, funny thing about it is that it is supposes to be useless at
SW ph, but I have found it to be a very handy antibiotic. I think the Oomed was banned because of contents, it is probably highly carcinogic or something like that. Another very useful antibiotic in the aquarium industry that we no longer have access to is Chloramphenicol, it was outlawed because it was highly toxic to humans, but it was very good in the aquarium trade.