I have a reasonable supply of Oxolinic Acid(r) capsules. I am informed, but have no personal knowledge, that these are no more than a dry, water-soluble form of Oxalic acid. Each capsule contains 30 mg of Oxolinic Acid(r). These are sold as a treatment for freshwater fish parasites. Anyone know whether Oxolinic Acid is, in fact, a form of Oxalic Acid? Lloyd Lloyd Spear, Owner, Ross Rounds, Inc. The finest in comb honey production. www.rossrounds.com