Can I Put

[Liz1993]

my pleco in the pond? its a common pleco and ive heard its been done before

 

[sadguppy]

No, not if you are in the UK. It will die.

 

[OldMan47]

A common pleco will do fine until the pond temperatures start to drop. At that point, unless you have a huge main tank, you will have no place to put it. A common pleco can grow to over 2 feet long.