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Yea I looked into that also.. fox farms uses the .7 (Truncheon) and my TDS meter is .5 (hanna) but.. 420-560 On Truncheon=300-400 On Hanna but I was reading around 200ppm added. I'm gonna make sure my meter is calibrated.

Yea I personally don't use any snake oils lol. Only the fox farm trio. I'm not wondering what to use or how much, I was just wondering why there is a guideline of ppm to use when their ppm doesn't match the teaspoons. Unless I'm reading it incorrectly, the soil feeding schedule says that...

Yea I started around 1/4 or 1/6 with the nutes. My girls have loved them, no defienciencies or burns but did a full strength mix last and realized the ppm didn't add up. The ppm guidelines must just be for the "hottest" bottles.. I heard they aren't completely consistent from bottle to bottle...

Crazy no one knows why the ppm doesn't match their schedule because I'm having the same issue. Perhaps they say it's "hotter" than it actually is? If that makes sense... I'll be calling the company tomorrow. I know their ppm conversion rate is .7 and I have a Hanna tds reader (.5) but once I...