Ya, here in the lower Mondego river delta it’s clay AND calcium concentrations that make water filters die in short order. They do rice here. I can’t imagine g

Ya, here in the lower Mondego river delta it’s clay AND calcium concentrations that make water filters die in short order. They do rice here. I can’t imagine gypsum helping anything here. They still burn the rice fields like morons every autumn, despite the dense clay here… I tried mentioning how even Cambodia prohibited burning and uses enzymes and got blank stares.