Quote:
Originally Posted by jorjef
Sit back and watch the tank.
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+ a million. Ich is one of those things, if it's not an active, out of control infection that is killing your fish, the cure can be worse than the disease. If you want your tank to be 'ich free', yes, you'll have to go through some long involved and laborious process of quarantine, treatment, and fallowing, but to what end? Are you losing fish? do they look sick? Any of the 'known' cures for ich present real and tangible risks to the life of those fish, and in the case of copper and (for some species) hypo, greater than the risk of doing nothing.
If you ever want to keep one of the known 'ich magnet' species down the road in a bigger tank, it might be worth investing the time now to try and get it out while the tank is small and you hardly have any fish. When you upgrade would be a perfect time actually, but if you're talking about just this tank and just these fish, I don't think it would be worth the effort or the risk, unless of course your existing fish start to exhibit symptoms.
Also, the next time an LFS recommends any kind of tang for a 29 gallon tank, you should consider that as a cue to take every other word that comes out of their mouths with one very large grain of salt. A yellow tang's adult size in an aquarium can easily reach 8 inches if properly cared for, which would a) look ridiculous in a 20 inch wide tank and b) be incredibly cruel. LiveAquaria suggests nothing less than 100 gallons for a yellow tang, and I find their tank size requirements can often be pretty liberal.