Scientific evidence indicates that freshwater dips are of little value for treating ich. In one trial they determined that attached trophonts were unharmed after 18 hours in Freshwater. The cycts are too deeply embebbed to have any real effect. You may remove a few cysts, but it is certainly not worth the stress on the fish.
Terry B
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Knowledge first.
A large water change can cover a multitude of sins against your aquarium.
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