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Wrong! 47 PPM starting water is very very good. All commercially available fertilizer made for cannabis will love that water! I do not know why cannabis growers are so focused on calcium.In the last year of working in the Infirmary I have not see 1 single case of calcium deficiency Quite the opposite.So what’s high on run off ppm
The water at my house is terrible it’s like 47ppm some one told me I should use calmag to bring it up to 160ppm
This chart has noting to do with EC (the measured PPM of a solution ) It is in elemental PPM - or weight of the element
First off ALL elements need to be included at all times for a nutrient solution to be in balance. If you leave out even 1 you can get a lock out. The ratios above show a wide range of possibilities. For example Just looking at the top 3 for expediency NPK 100-30-100 is in balance, 200,50,300 is in balance, 50,50,300 is not because the nitrogen is out of range low.
This is a simplified chart of the relationships of the elements.
Here is one that will blow your mind:
Any how the point I am trying to make is always fertigate (feed) your plants a balanced with balanced nutrients.