HOW TO attach DWC RESEVOIR

I have done DWC for the past few grows and it has gone really nice. I was wondering if anyone could help me conceptualize a very small project:

I have two, two gallon buckets. Each has a circular cut in them for the net pods.

I have another bucket that holds 5 gallons of water. I have a couple air pumps and both my feeders feed up to 6 plants so that's not a problem at all.

*What would be the simplest way to make an external resevoir (5Gallon bucket) that naturally fills the other two buckets up and when they over-fill, it goes back into the 5Gallon(resevoir)?

International Cannagraphic Magazine Forums - Blazeoneup's Recirculating Dwc Construction Tutorial!

Hey man this is tutorial I used to make a 4 bucket (5 gal) recirc dwc with another bucket as a controller hooked up to a rubbermaid rez which is linked in my sig.