Adding maxibloom to RO. PPM only at 130?

i added 7g to a gallon and it brought my ppm from 18 to 130. Is this ok? I'm having some mag deficiencies, so 1 tsp epsom was added, but that number seems very low. Currently week 5 of flower.

That number is way off.. Have you calibrated your meter lately?.. Five weeks in I run just under 1000 ppm..