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Discussion Starter · #1 ·
I have a pleco that has been in the tank a few years. After additions of some corys and more plants, he is becoming increasingly aggressive to all inhabitants that venture in his lower half of the tank. What could be the causes?
 

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Discussion Starter · #5 ·
He's approx. 4.5 to 5", but has been that size for over year and a half.
 

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Discussion Starter · #7 ·
I think my son and I are going to swap plecos. He has a small in a 35g with cichlids. My bigger pleco will have more room.
 

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Common Plecos can reach a foot to two feet long. There are several species sold as Commons. I would not keep one in a tank under 6' long.

Return the Common to the store and get a fish more appropriate to your tank size.
 
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