I've decided to go with the JBJ ATO device. In all the research I've done, I have only come across one pump to use with the auto top off devices -- that was at Auto Top Off dot com.

I've got a 10 gallon reservior that's 32x9x4, which sits nicely behing my stand. It has a 3" opening on top for filling.

Can anyone recommend a pump for the ATO and to connect to my Nilsen?

THANKS for all your help REEFLAND!