Giant tank 1500 L kitchen tank I used this as an inspiration for building a 300L rivertank (150x50x40 cm). You can use the same plywood as these guys. But do not remove the brown film on the plywood - just sand it a little before you apply epoxy. The guy with the 1500 L kitchen tank realy removed ...

Its in english as I don't think you'l understand Norwegian

Plywood tank