Plywood sump box?

I see lots of glass sump tanks, even Rubbermaid tubs... Anyone have a plywood box sump tank?

Would it work as well? Build a box with dividers and bubble traps like a glass tank, seal the wood with fish safe epoxy. Install baffles, bubble traps, heater, light, plants, bio balls, pump... etc... close it up with a removable lid for access and cleaning...

I am still working out design ideas for the 125 gallon tank I am rebuilding.

I could cut in slots for the dividers so the inside would be easy to reconfigure or clean as well. Seems to me that if done right it would be quiet, and not allow evaporation. With a drain tap in the right spot, you could stop the flow from the tank, drain the sump and refill for water changes without disturbing the display tank. 125 gallon display with an 80 gallon sump box built into the stand...

Any thoughts? Or am I simply nuts?

I know 80 to 85F makes bio media happy. Would adding a bubbler or Co2 to the section with bio balls enhance the cultures?

Kinda six of one, half dozen of another... I did not mention, I already have a full sheet of 3/4 marine plywood, and will have plenty of silicone since I have to reseal the 125. As for the epoxy, Since I will be redoing the bottom of the 125 with plywood, I need to get some anyway... So most of the materials will be on hand, Next, I have to build a stand for the 125 as well, so I can custom build the sump to fit.

Guess my main thought was wondering why I had not seen more about plywood sumps. Build expense seems like a good reason...