Hi guys, im planing to make a 330gal behind wall tank. The rough design is as attached below

The main display tank will be the 200x90x70cm, the left side compartment will be hidden behind the wall, only the display will be visible.
I will have an overflow compartment on the left side where the PVCs, some plants and heaters are hidden. I also make a 50 gallon pre-treated water box where the new water from the well will go to box #1 filled with carbons, then go thru box #2 and then the water will overflow to the PVCs compartment.
The overflow height from the main tank to the compartment will be 60cm tall, where the tank it self is 70cm tall.
ABC and D will be a 2in pvc (50cm tall) to the sump. While E will be a 2in pvc in case i need to do a huge water change. And lastly F will be a 2in drip overflow to the backyard/sink, the height of pvc F will be 60cm so the water level will stays there.
For the drip rate im thinking of 2GPH, so the water is fully treated at least 24 hours before it mixed into the system.
I read it somewhere a 2in pvc is good for 1500gph rate, so having 4x 2in pvc : 6000gph to the sump allow me to have pump with rate 3000 gph
On top of that i will also use 2x fluval fx6.
Will this design works? Any advices will be appreciated

The main display tank will be the 200x90x70cm, the left side compartment will be hidden behind the wall, only the display will be visible.
I will have an overflow compartment on the left side where the PVCs, some plants and heaters are hidden. I also make a 50 gallon pre-treated water box where the new water from the well will go to box #1 filled with carbons, then go thru box #2 and then the water will overflow to the PVCs compartment.
The overflow height from the main tank to the compartment will be 60cm tall, where the tank it self is 70cm tall.
ABC and D will be a 2in pvc (50cm tall) to the sump. While E will be a 2in pvc in case i need to do a huge water change. And lastly F will be a 2in drip overflow to the backyard/sink, the height of pvc F will be 60cm so the water level will stays there.
For the drip rate im thinking of 2GPH, so the water is fully treated at least 24 hours before it mixed into the system.
I read it somewhere a 2in pvc is good for 1500gph rate, so having 4x 2in pvc : 6000gph to the sump allow me to have pump with rate 3000 gph
On top of that i will also use 2x fluval fx6.
Will this design works? Any advices will be appreciated
