People talk about matching temperature and pH, but all I've ever done is match the temperature. So in a bucket of freshwater, mix up hot and cold until you have the exact same temperature of the tank water.
Catch the fish, put them in the bucket, wait about 4 minutes, and then let them back into the tank. If it's black ich, the flatworms basically explode under the osmostic pressure of the FW and they fall off. You can actually seem them fall off, looks like little fine ground black pepper dustings.
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-- Tony
My next hobby will be flooding my basement while repeatedly banging my head against a brick wall and tearing up $100 bills. Whee!
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