Sorry to break it to you guys, but lots of the Wels info here is simply wrong. No they can not grow to 7m, not even in the ebro or po. I'd say in an even warmer system 4m max.
Also they can be kept in large garden ponds as they are not very active fish. The pond just needs to be large and very well filtered.
Also they can be kept in large garden ponds as they are not very active fish. The pond just needs to be large and very well filtered.