I was a taught that you ppms are really based on your light watts, have you heard this anywhere?Chronic overfeeder. ROFL! Have you tried boost?
Be warned, Those levels with canna alone, will not be enough for heavy feeding strains. You got it solved with the cal/mg. That is why I was always turned off by there base.
For other reading and making the switch: If your switching to canna from another brand good to keep that in mind as well. Same ec in canna is not the same as other brands as well.