Hi guys:
First, Momoney, to answer your question, soaking the food in garlic for 15 min. is more than enough. We usually just soak it for 5-10 min. Any garlic remedy is just a treatment, not a cure. Almost 100% of the time when we have a customer who is using garlic, and still has an ich infestation, we find that one or more of the water parameters is off. Sometimes the cause could also be fish incompatability (the affected fish is being harassed by one of its tank mates). We ask the big four questions, what is your salinity, ph, alkalinity, and temperature. It's almost 9 out of 10 times it's one of these. You wouldn't believe how many times it's the salinity that is off substantially; thus, we ask the customer to bring in his hydrometer so we can test it against our
refractometer. See if it's one of your parameters. I just noticed that you said that you have a powder blue tang. These guys are a pain because no matter how pristine your water conditions are, they'll still break out with ich. I don't mean to say that this happens 100% of the time, but it happens enough that we tell our customers that they should expect these things to break out with ich; keep feeding it (with garlic), and watch your water parameters. The members of this particular genus, Acanthurus, are particularly high strung animals, and they also require quite a bit of water current. Blast them!
We were the only store to have done any sort of field study with garlic. This was not strictly scientific (i.e. controls, control groups etc...) but we did record findings, dosages, etc... We studied several types of garlic, Kyolic, cloves, garlic juice (Mckormic brand), garlic oil (Healthway brand), garlic powder (Mckormic brand). Long and short of it, the cloves had the best results, but a lot of people do not like the amount of time to prepare, nor the smell associated. A close second was the Kyolic (2 oz. liquid, bottled), hardly any smell, and water based. The results with the Kyolic almost mirrored the cloves. Garlic powder and oil sucked, and the garlic juice was only marginally better than the aforementioned two. We ran the study for 12 mos. We didn't lose a single invert to any of the garlic remedies. We posted some of our findings here and on reefcentral a couple of years ago. Remember this is only a treatment, and is most effective when correcting the cause of the ich. The best "cure" for ich is copper (it will kill it). Our recommended dosage for garlic is 2-3 drops of garlic for every piece of food (frozen cube, pinch of flake, etc...). Using the cloves, use 1 crushed clove for the total amount of food, marinate for 10 min., and then take clove out, feed fish. Use the water out of your tank to marinade the food. You can feed garlic to your fish everyday, and even mix supplemental vitamins like LA-Lawman does, and it won't harm any invert. HTH.
Vitz:
Thanks for the link. In the thread at reefcentral that I was referring to, the guy that said that garlic wouldn't work sounded so worked up against any garlic remedy just because no one had conducted a scientific study, and pompously stated that until someone did, he wouldn't put any garlic anywhere near his fish food. Plus, he quoted some article, which he didn't identify the source of, that said that garlic couldn't work because of a fish's acidic stomach. All we know is that we have had more success with Kyolic garlic than any chemical (except copper), including those so called "invert safe" chemicals. HTH - Staff