if i may, it's a pond with glass on 1 side. with constant water flow means it's simulating a river, so adding CO2 is not necessary and dosing ferts means heavy cost. sunlight is the best source of lighting IMO
Jeff, i never thought that you have 70% of shade net there. i thought it was only like 30-50%. worth to try since i never had success growing anything without algae with sunlight.