It's taken me 2 months to mineralize this topsoil in the dead of summer in Orlando (lots of rain). But it's finished, pond is planted and flooded. Will do water changes for the first couple weeks as things settle in, after that hopefully it will take care of itself.
Roughly 20 gallon Plastic Planter Tub
Mineralized topsoil with Safe-T-Sorb cap
Pond snails (possibly fish/shrimp later)
Mixed stems trimmed from other tanks, with floaters to cut down on the sun's intensity.