[quote=”Peter Finke” post=2938]The only efficient medicine we know of is 2-amino-5-nitrothiazol, a yellow power, which was sold as “Hexa-Ex” (by Tetra) or Spirohexol (by JBL) in a pressed solid form. It it becomes brown (after a few months, if not stocked properly in a refrigirator), you can throw it away; it has become ineffective. Since one or two years however they sell it in liquid form which is better to apply, but it is inefficient against Oodinium. So, at present we have no efficient medicine against Oodinium. [/quote]
The Spirohexol tablets are still available, though not produced anymore by JBL. Google helps you find distributors.
Aminonitrothiazol (or 2-amino-5-nitrothiazol) is also said to be the agent in “Amtra Medic 5”. I couldn’t check this because the website of Amtra is not available at the moment.