Originally Posted by cerianthus
I am not trying to bring more confusion but posting as precautioany measure on top of what BB suggested/posted.
Although both malachite green and methylene blue can be effective agents in treatment/preventive of cerain fish dieases, please do research on what it is and its toxicity effects on Species of Fish before applying.
I have used both agents ,even potassium permanganate, in combating diseases successfull but very close attention should be given, especially with malachite Green, IMHO.
Maracyn and Maracyn II is effective antibiotics but there are other effective antibiotics avail to treat various types of fish disease. Try researching other derivatives of tetracycline such as OxyTC, a terramycin.(maracyn II, if memory serves, is one of TC derivatives)
Also avail are sulfa based antibiotics along with other types of aminoglycosides, etc. etc etc.
There is specific reasoning behind my choice of malachite green to treat this problem vs some of the other meds that were listed here. For starters, Triple Sulfa is something I fall back on as a last resort simply because many people are highly allergic to it. Just being near it is enough to send some people to a hospital ER. I have seen first hand (my boss) the effects on someone with an allergy, and it is not pretty... not to mention painful and debilitating.
As for the Maracyn meds, while these are great meds they are mild in comparison to the malachite green. Some fish species respond better to certain medications than to others, and rainbows are one of those who responds much better and quicker to Malachite green than to Maracyn.
Another reason for my choice is because these fish have already been through some medication treatments, and this bacteria has proven resistant to them all.
It is important that everyone be aware, when I prescribe meds it is not based on the claims made on packaging and labels. I base my decisions on the ingredients, the amount of effective ingredients in each med, the species of fish and how well they can handle a specific medication, and known responses to various meds for various illnesses.
It is ok that many people find fish medicine very confusing and complicated. It is not an easy field to work in, learn, or understand. Fish medicine requires many yrs of intense study, many yrs of hands on experience, research, etc. No one person will ever know it all, but some of us have had the opportunity to learn much more than others. It is no different than someone taking their dog to a vet for something that isn't a simple common sense fix. A dog with a bacterial infection is not going to get better if the owner has to do the much needed research to first diagnose the problem and then find a safe effective treatment, thus the dog goes to a vet who has years of education, experience, and research to help get it right as quickly as possible to preserve the life of the dog. Fish medicine is no different other than the medications are much more readily available and there are fewer individuals out there who have the education, research, and experience to help. When it comes to fish medications there are just as many risks involved, but people rely on company packaging to tell them what they need to know about a given medication. That simply isn't safe. Most companies do not list the specific warnings on their labels, nor do they list the specific species a given med is safe for.
When there are multiple species that need treatment for the same illness, finding 1 medication that will work effectively for both species and still be safe... can be quite a challenge. If given the chance to consider another medication for these fish with this situation, I would still be advising Malachite green over all others.
I hope that helps to explain my choices. Please know, I do not take other people's pets and their lives, or their pocket books lightly. It has taken me many yrs to learn what I know, and I still have to reference my research papers, text books, etc from time to time in order to find a safe and effective solution for someone. Also, I learn something new every day. This is a field where learning is endless.
Doing this via interent is a challenge of its own because it does not allow me the opportunity to view/examine these animals in person, does not allow me to collect biopsy or scraping samples to put under a scope to properly identify a strain of fungus or bacteria. When we run across bacterial infections in fish, there is no way to be sure if it is gram positive or gram negative bacteria without the scope work. Not all antibiotics treat for both gram positive and gram negative bacterias, nor do they list on the labels which of them they treat. So not knowing which the fish is infected with leaves us with only first hand knowledge of a given ingredient and what it treats, and to find a safe combination that covers both as often as possible. The other alternative is to treat for one, hope the fish doesnt die if its the wrong one, which gives time to treat for the other.
I could write a books worth of explanation here for you, but I dont think that is needed (nor do I have the time). I just felt the need to stress that I don't suggest any medication to anyone just by guessing or from some claim a company makes on their product. I bring with me my own education, research, experience, and that of my husband who is an aquatic biologist.