I have no interest in getting into a debate but instead will say that many renowned authors recommend the use of copper based treatments . The problem, generally, is not with the drug/ chemical/ treatment used but with our own lack of understanding of the uses / problems/ side effect/ dangers...etc. of them. In short the uneducated user of the product is usually to blame but like with most things we find it easier to blame something other 'n ourselves. I have been in the marine ornamental business since 1995 and deal with many drugs and chemicals on an almost daily basis. I learned early that the blame game gets you nowhere and information and results are what we should be after. I have acquired a small library on the treatment of fish and the use of drugs and chemicals used in the treatment of fish. I am not advocating the use of copper or any drug/ chemical without first understanding the risks. Most if not all of the treatments available have risks that can even be fatal when misused. Copper treatments come in many different forms and the type used has its own particular limitations and risks. As an example Cupramine, which was mentioned above, can become many times more toxic if used in the presence of a UV sterilizer ( the directions tell you to turn it off if present) and ozone units, aldehydes, and some dechlorinators ( not on the bottle the last time I looked.)
Three books that I have used frequently are "AQUARIOLOGY (Master Volume) The science of fish health management" by Dr. John B. Gratzek.
Diseases in marine aquarium fish -causes-symptoms-treatment" by Dr. Gerald Bassleer.
"Handbook of drugs and chemicals used in the treatment of fish diseases -A manual of fish pharmacology and materia medica" by Nelson Herwig
For the average aquarist I would recommend sticking with what works for you but to keep an open mind and realize that some of the failures you may have had may have been of your own doing and not the fault of the product used. I would also recommend looking at these links.
http://www.reefkeeping.com/issues/2003-08/sp/index.php
http://www.reefkeeping.com/issues/2003-10/sp/feature/index.php
Dr. Gerald Bassleer (°1954) received his Masters in Biology at the University of Antwerp in 1977.
He became a Doctor in Fish Pathology & Fish Health Management after studies at the following institutions:
- the faculty of Veterinary Medicine at the University of Maracay (Venezuela)
- the College of Veterinary Medicine at the University of Georgia (USA)
- the Unit of Aquatic Pathobiology at the University of Stirling (Scotland)
- the Unit Biology of Fish at the University of Hohenheim (Germany)
Dr. Gerald Bassleer has 28 years of experience at 5 different wholesalers in 4 different countries: Belgium, USA, The Netherlands and Germany.
He has an international reputation through his management skills at Aquaria Antwerp in Belgium (1977 - 1981), Ruinemans Aquarium in the Netherlands (1985 - 1991); O'Hare Tropical/Chicago (1981-1985) and Aquarium Glaser in Germany (1992-1995)
He is the author of 2 well known books on fish diseases.
He writes for several magazines and he's an advisor & member of OFI (Ornamental Fish International Organization for the aquatic trade).
Dr. John B. Gratzek received a bachelor of science degree in biology and chemistry at St. Mary's College in Minnesota. He was awarded the Doctor of Veterinary Medicine degree from the University of Minnesota in 1956 and a PhD. In the study of animal virology from the University of Wisconsin in 1961. He headed the College of Veterinary Medicine at the University of Georgia. He is the past president of the American College of Veterinary Microbiologists and the International Association for Aquatic Animal Medicine, and served on the aquaculture committee of the American Association of Animal Health.