Methods of measuring for PPM

flush at end of grow - zero evidence only anecdote supports it and many of those anecdotal reaons have been proven false -- quantitatively so.. incontravertibly so in regard to effect on mineral content of the flower. Many of the stated reasons given by proponents of it have been proven wrong. then, they make up new reasons. Yet, never test anything they purport. this is not evidence. If that isn't a red flag to stop listening to "them/they" i don't know what is. Imagine someoen told you you had to do something because it reduces mineral content in flower, but then in reality it does not.. then they say well.. umm.. uhh it does this and this and it's still importnat ot do... that just reaks of bullshit. flush due to overfeed or too high of concentration in substrate. Cause and effect.. goood reasoning in this context. Doing so for no cause is ... well it's just masturbatorial

TDS pens suck. They measure EC and convert. Depending on the brand of equipment you use it may convert it one of 3 or 4 different ways. That should tell you enough abuat the accuracy and precision of a TDS measurement. (500 scale, 700 scale, 1000 scale, possibly a 4th out there? TDS probes are not all equal.) USe EC not PPM from TDS pens. You'll save ytourself a lot of frustration wondering if someone's stated PPM is from the 500-scale or the 700scale.. different ppm values but same EC behind it. You can check a local water quality report, if you have "city" water vs a personal well. This wil tell you the dissolved content of the water coming out of your tap... not soft water. Softened water, in general will be find for 3-4 months of time, but maybe don't use it on a mother plant you keep for a year or longer. Calculate your PPM from the guaranteed labesl. There are online ppm nutrient caclulators. There's an app that does it (blanking on name) ... juse follow directions and type in % values off the guarnateed anaylsis lables... if your fertilizers don't have such lables, ... well, that's just makign something simple over-complicated, lol. TDS pen probably best for that context in the absence of beign able to rely on what is in the product and it's contents being consistent/precise. https://www.angelfire.com/cantina/fourtwenty/articles/profiles.htm -- there's "1" or make a spreadsheet. you'll need a periodic table and a few equations to aid your endeavour.

I did use a clean plate and the 3rd measurement was at 149. And thank you for the support i am grateful for the information. I about as ready as i can be to harvest,dry and cure for the first time

149 is already great result as i heard from comercial growers. How you measure it ? Do you put clean collecting plate and take NOT FIRST run off ? If yes,you did all right by measuring. And supporters of flush would be proud of you ;) Some say flush is a myth and have proof for it ;)