The Maxi EZ Pad is perfect for Larger Spas.

EZ Pads offer a superior alternative to concrete as well as other hot tub spa foundation systems. Inexpensive, environmentally green, and easy to assemble, EZ Pads do not void manufacturers’ warranties that specify a “solid, level, surface” for hot tub/spa placement. EZ Pads do not crack or break down, are resistant to chemicals and offer a lifetime guarantee.
Note
EZ pads for swim spas need to meet local council/certifier requirements and have to be correctly installed to not void warranties.