Using jacks 321, dont want to mess up now

I added 20 grams of booster to 5 gallons of water

What should the ec be

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The us/cm under reading is flashing so i dont know if its correct or not but ppm is 553

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553 ppm would be 1106 EC.

1.6-2.0

I just fed that, 5 gallons to my 3 plants tell me if that was okay please and thank you Merry Christmas

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Should be good this feed, try to slowly get to 1000 ppm runoff by mid veg.

Im 2 weeks into flower

My next feed in 2 days will be 2/2/2/1 and 1/2 the 1 and a half will be mkp

And then I’ll either do 4/2 or 3/2/1 for rest of grow