bigbadfish711;4780110; said:
get one that is 1" and put it a tank with rbp then the rbp will never even feel the shock of this guy. It's shock will be nonexistent.
You said 1' not 1" which would be quite the difference just clarifying. A 1" E-Cat will still be able to shock a 1" fish pretty bad it just wouldn't feel like much to a larger fish or a person.
Related to the OP's original question though this is a terrible idea for so many reasons I don't even know where to start.
A) RBP are not from the same area, the water parameters for those fish are the complete opposite of that for an E-Cat. RBP = low ph and soft water, E-Cat neutral-high ph and hard water.
B) It is almost certainly not a Dwarf E-Cat that you are buying, you are making the assumption it's a dwarf because it's a 1" fish it sounds like. There have been maybe 3 people I've seen between all the forums, including the asian fish forums like arofanatics that have actually been able to get a hold of a Dwarf E-Cat. 99.9% of them are malapterus electricus as it's been suggested.
C) E-Cats do not do well with tank mates at all, with the exception being with synodontis catfish which are immune to the shock. This I concluded from experience housing the two species sucessfully for a year in my personal tanks. I had a 10-12" E-Cat with two different species of syno's. You can search my old threads about Jimmy the E-Cat if you want more information about it.
D) The E-Cat would kill your RBP in a matter of minutes the first time they screwed with it simple as that.
I encourage you to please do a little more reading and research on the forums before even contemplating something like this because all this information is readily available on here and it should be common sense not to mix RBP with anything.