Co2 reactor for large 6 x 2 x 2.5 210gallon ( 800litr )

Hey all have done a fair bit of reading and leaning
cheers for the resources


I have a moderately planted tank ( fert dosing is a liquid fert made up in aus at the moment but reading up on EI ) as above and looking at the best way to diffuse co2 into the tank

currently have the large ista mix max reactor with a 1200lph (315 or so gallons per hour ) power head and i get
a nice stream of micro bubbles throughout the tank.

what are your thoughts on what i can do to dissolve the c02 more efficiently ?

i have thought about running 2 of the ista mix max reactors in line with each other?
I do have a rather larger cannister filter cranking out just over 2300 lph ( 610gph ) ( twin outlets )
i could run it in line with this but i dont want to reduce the flow too much

cheers

Frank