and of course you can grow diamonds like that but the willow is very dirty and small and sometimes diamonds without crystallizing well, at least that’s how it happened to me
its all about the input material in my experience. I ran a closed column previously and I’d soak for 30 mins without dry ice, just a cooler with ice packs. I was running material about a week old from harvest and it would always come out yellow and I was always getting decent sized rocks (2-3cm diameter). I was only running a 6"x1.5" tube at the time, so my final yields were around 5-7g. I still got these runs to crystallize without any problems even though I had 1cm or less of solution in the jar.
I have an old 1lb OSS system for sale.
It needs a few parts and love.