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The temp is the all the same temp always that he calibrated the pen at (1000 NaCl @ 78 deg F) Listen ebb and flow, lighting -- all that doesn't matter -- I'm saying the second he mixes up side by side (usually one or the other to pour over soilless mix but side by side just to test what's going...

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...

not one reply? Is this in some RTFM FAQ I'm being rude and not reading first or does no one in the mood for typing know the answer?

...Well I see Sodium silicate polymerizes at pH 10 anyway... I thought it was silicates in solution period... Either way is this my answer: (from PQ corp) When solutions of relatively high concentrations are acidified, the soluble silicate anions polymerize to form a gel. (BUT?) --> When...

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...