Bullying Swordtail Platty

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Cindyk

Aquarium Advice Newbie
Joined
Dec 1, 2014
Messages
7
Location
Midwest
Hi! I have a 55 gallon freshwater fish tank. It is stocked mostly with Platy's, guppies and tetras along with 2 swordtails and 2 Gourami's - 1 a dwarf red and 1 a larger gold. The swordtail is attacking the dwarf to the point where he has a large white ulcer/sore on the side of his body. It is not attacking anything besides the dwarf. Is there some way to stop this behaviour before he eventually kills the fish? The other swordtail in the tank does not attack anyone else. The dwarf gourami has only been in the tank for about 10 days. The larger one has been in the tank for about 4 years. Could it be just the new guy getting picked on?
 
You could try re-arranging the tank or shift the bully to QT for time out so the others can get established.

Can be hard though once they make up their minds that fish has to go.
 
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