stray electricity help

Hate to bring this up again but I need some advice. 

Yes I have read the previous posts about stray electricity.  No I don't have a grounding probe.

I have gone through the process of elimination to find the stray electricity.  Seems like I had more than one problem.  One was a bad gfi, another a bad surge protector, and another was a bad rio pump.  I'm thinking this in an awful lot of problems to cause the stray electricity.   But removing/replacing these elements have removed the problem.

Thought I was doing really well until I plugged in my sedra 9000 pumps.   Zap again.  Both of them!!!!!  Both less than 2 months old.  Tried a different surge protector, removed the surge protector and still the same.  This seems very strange that I would have ALL of these problems to cause stray electricity. 

Any ideas?  Suggestions?  Will the grounding probe solve this?  Should I just put my shoes on when I put my hands in the tank?  Upstairs tanks are fine, I can only feel the zap in the downstairs tanks when I have my shoes off standing on the cement?

HELP!!!