sera Baktopur Direct The laureate of the Nobel Peace Prize 2009, U.S. President Barack Obama Nobel Peace Prize Winners Obama Nobel Peace Prize Winners Obama. sera Baktopur (Bactopur) Direct tablets. Water conditioner effective against bacterial infections of freshwater and marine fish even in advanced stages. These include, for instance, Columnaris disease, fin rot, gill rot, Aeromonas or Pseudomonas bacteria, inflammations and open ulcers as well as dropsy. Notice: The product image shown on this page is a sample stock photo by the manufacturer and should not be used as a size reference. Please read the description and use the dropdown menu to select the accurate size and quantity sufficient for your treatment before adding the product to your cart. For further questions, please contact us before placing your order.