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i bought a swordtail 2 days ago, and today/yesteday i found that he was going upto objects turning and kind of like "iching" he doesnt go back and forth, he goes forward turns his body and hits the object. i undertand this could be something called whitespot. allthough when i bought the fish it was fine and all the other fish in the tank with it looked healthy aswell. none of my otherfish have whitespot/iching only the swordtail.

the swordtail is also acting normally (like anyother fish) its feeding like normal and its swimming like normal, plus its not trying to hide or anything either, i also reduced the tank temp from 28c to 26c the day i bought the fish too, would this have an affect

Flicking can be caused by water perameters as well as parasites, it might be worth checking the ammonia , nitrite, and nitrate levels. Any fish moved from a shop tank to a home one might experience a little irritation in the first few days as it acclimates. Its generally not a great idea to put a fish through a move and then immediately change the temps again, it can contribute to acclimation shock.

Flicking is often a sign of emergent ectoparasites parasites though, so continue to keep a close eye on the fish for a week or two, whitespot is a real possibility, and it often emerges with new aquisitions.

Given the fish are new and still settling in, id avoid treatment until you see a definate symptom. It could just be a touch of stress, plus maybe scratching at a few bites from the tussles a lot of fish get on introduction to new cagemates. Time will tell.

I would remove it on it's own in another tank, as a precaution. Be carefull & check for lice.

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Member of the Malta Aquarist Society - 1970.
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Thanks for the advice everyone.

the iching has calmed down now, it has not got worse. i havent seen him ich for a day and half now. unfortunatly i dont have a spare tank set up.