macsnax
PICK YOUR OWN
Ok so maybe I need a new meter. I don't check ppm too much, I have a handful of feeds that I use for different sets of plants. And I've used them for quite a while. It's probably been 6 weeks since I used my pen. I'll be ordering a new pen today, lol. I came up with.....I went ahead and mixed up 2 1gallon jugs of water. 1 has 4g MC. It came out to 1.2 ec or 600ppm(500scale). The 2nd has 4g MC and 1g epsom. It came out to 720 ppm and 6.0. I'll measure in 24 hours and then in 48. Keep in mind my tap was at 60ppm and 6.8 ph
105-tap
Add 4 grams mc = 403
1 gram SC = 458
+2ml calmag = 515 for the solution.
515ppm seems low to me, so it's gotta be my pen.