macg said:
taken into consideration that this is a forum, and that opinions/skepticism is not at all unallowed, there is still that "Respect" we should always consider.
I just spent the last 30 minutes rereading all the posts in this thread and I saw no disrespect being directed towards Cratylus. I did, see, however, see lots of posts from people who were ready to accept that ginger is the new cure for marine "Ich". I also saw a number of posts from people advising caution as the method was not proven, which seems to be a very reasonable response.
I applaud Cratylus for raising this and for thinking of it in the first place, but also warn people to be cautious. Not because I don't think it works, but because there just isn't sufficient evidence that it does. Even the improvement that Cratylus reported with the purple tang may have simply been timing and the trophonts were about ready to drop off. And, no, I am not being pessimistic, I am being realistic and thorough. Even if Cratylus reports back that the tang is now cured, we still won't know if it was the ginger or simply the fish developing an immunity.
These sorts of reports are always very interesting and are often the way that new methods get discovered. However, until the method is proven, I don't believe we should be throwing out methods that have been proven, such as hyposalinity.
How would it be proven? First of all, we'd need to understand what the ginger is doing, so that an appropriate experiment could be devised. Possible hypotheses could be:
1) The ginger helps the fishes immune system so they can acquire an immunity more quickly.
2) The ginger gets into the blood stream of the fish and directly affects the trophonts when they ingest body fluids of the fish
3) The ginger in the water kills the trophonts, tomonts, tomites or theronts directly
And there could be other explanations. 1) would be very difficult to test without a lab and would involve serum analysis. 2) should be reasonably easy to test as a) the trophonts would drop off the fish sooner and b) they would be dead. Similarly, 3) would be fairly easy to test as you could do it
in vitro.
Other questions that would need to be answered are:
* Are there any short or long term side effects?
* Does it work equally on all taxa of bony fish?
* What impact does it have on invertebrates, especially corals?