Not buying it. Reads like a reverse UG filter(which is nothing new), replacing the plastic uptubes with things to make them look like SW
overflows. Not buying the claims about nitrates either. Unless heavily planted/macro or using an external nitrate removal system/resin water changes are required.
In the end you have a UGF
fir bacterial and a power filter for mechanical/chemical. You'll notice they reference plants for nitrate removal scattered throughout the site.
Nothing revolutionary here I suspect