Pond Boss Forums GENERAL QUESTIONS Product sources ESS-13 New Pond Build

Hi I'm seeking some info on ESS-13

I'm digging a new eco pond as my filtration source for my Koi pond in Florida, I just hit black hard pan 5 feet down. the hard pan is about two feet thick. under the hard pan is the water table which you can see starting to seep.

I wanted to know if I dig out the hard-pan and mix it with ESS-13 put a foot back down on the bottom and add a foot to the slope if it will make it hold water?

Thanks