True but this is a little different, they're called swamp tubes. You just lay down about 10 pounds of lime, put a large tote/bin with the bottom cut...
Found them at the dollar store, they're made of tarp material pretty much and have 3 small holes on the bottom. I'm going to try them in a swamp but...
My friend has been growing 7 plants, unknown genetics but they came from marc emery seeds a few years ago. Here are some pics taken from a phone. They've been vegging for about 50 days and budding for a month. His gear is a 600 watt lamp in each tent with 2 tents, 4 in 1 and 3 in the other. Grown organically mostly but he used a bit of chemical fertilizer a month or so ago, he's feeding them bat guano now and is about to use molasses (no sulpher). You can't see the phenotypes here probably but