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My friend has one of those cheap TDS pens that makes a lot of sense when using Jack's Hydroponic A/B (A+B= 20-12-26 total). But when he switched (basically a soilless growth medium) to Jack's 20-20-20, it takes at least twice if not three times as many teaspoons of 20-20-20 (as A+B combined) to...

Ok, both from posters here and the leading manufacturer of wholesale agricultural potassium silicate bulk all say it polymerizes at a pH lower than 10. At first I thought, "Why did I just see it dissolve so quickly in room temp. distilled water?", one answer of which tried to hit me: "I suppose...