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Originally Posted by bulletsworld
Garlic does not cure ich. It only helps the fish immune system, you will still have ich in your tank.
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True, I should have been more specific. I read up on this cure before using it. Apart from various forum users saying "use garlic" I read a few articles I found by Googling. This is a layman's summary of what I read from a couple of sources.
Apparently, after ingesting the garlic, the fish excretes it from it's skin , this is unappealing to the ich and it falls off. Also new ich will not attach to the unappealing skin. If the ich doesn't find a suitable host it dies. After time if all goes well all the ich in the tank dies.
As I said this is a summary and I can't vouch for the scientific merit of this knowledge. It made sense to me at the time and worked well for me. I'm not a scientist and if this information is wrong please correct it. We all know there is erroneous information all over the internet.