Covering, protecting an external pump

[Jerry]

I use an inverted rubbermaid with slots in it to fit over PVC pipes.

I think a fake rock would look a lot better. I can cast one I am sure.  I assume it will need lots of ventilation.  The sun will be beating down on it.
My last Sequence pump lasted 6 years.  It's protection, I felt was mediocre at best.

How much ventilation should I have.  I suspect a few holes is not enough.