05-18-2010, 09:51 PM
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The tank conditions make it tough, because you have the quarantine set up using display tank filtration methods. Using live rock and sand as the only biological filtration in a Q tank makes it impossible to use most medications, eliminating one of the primary reasons for the quarantine to begin with. I would suggest that you establish a biological filter in the Q tank and remove the live rock. The easiest method of which is a simple sponge filter or hang on biowheel type filter.
In any case, at this point you need to introduce garlic into the daily feeding routine. Garlic has been shown to be a powerful boost to a fish's ability to resist parasites, notably marine ich. I personally use the Ocean Nutrition pellet foods for this purpose, as they are enhanced with garlic that fish seem to utilize efficiently. I have not had similar success with other foods on the market, and I have tried many "garlic enhanced" foods.
I have had several cases of ich which were "cured" simply by feeding this food over an extended period. I documented this very well in 2008 on this forum when I had a Coral Beauty Angel contract inch in a reef aquarium. However, this was in a display with no other options. In a Q tank, I personally like good old fashioned Quick Cure, and have had great success with it in bare bottom sponge filtered systems.
I would also warn you that a 10 gallon tank is very small for the purpose of quarantining 2 fish at the same time. Your heart is in the right place, but I would just advice to utilize more patience and caution.