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As I adjust the PH of the nutrient solution, I realised that also the EC goes up. It makes sense, since I am adding more ions to the solution which conduct electricity. But how will I control nutrition if the EC keeps changing without a change in the actual nutrient concentration?
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well that's a good question, although I don't hold much stock in EC/PPM or TDS readings, because none of them can tell you what the exact elements are. They just tell you what the total of all the elements are, so you have no way of knowing what has been depleted, or what's in high concentrations. I go by the manufactures recommendations (amount to mix per gallon), and I adjust my concentrations from that. I also change the nutrient solution every 1-2 or 3 weeks, depending on the size of plants and reservoir so I know it's balanced.
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Also, My PH changes quite rapidly, I have to make adjustments every day, if not more. And I am getting sick of it.
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Well if you are needing to adjust your pH daily something is wrong.
1. What
nutrients are you using?
2. What pH adjusters are you using?
3. What type of water are you using (tap, RO, softened, rain etc.).
4. What is the temperature of the nutrients?
5. What is the size of the reservoir (gallons).
6. What plants are you growing, and how big are they now?
7. What type of pH tester are you using.
8. What pH are you adjusting them to, and how far off is it in a 24 HR period.