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How to regulate soil PPM?
fish_ringerstarted grow question 4 years ago
on second week of flowering (day37) i Watered with nutes ( 600ppm, ph 5.7)
after watering, the runoff was 1200ppm
after 3 days watered with distilled water ( 0.3ppm - ph 6.5)
and the runoff was 616ppm
is it OK? how to continue feeding?
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Burmeseanswered grow question 4 years ago
Hi Bro, Let the run off to be around 20% of the total water.I prefer slight nute burn.That means they have enough.You are doing right Bro.You reduce dosage because you think you have high run off ppm.Run off ppm around 1200 is still ok for flowering stage.But make sure at least 20% to be run off.So there’s no salt build up in your medium that causing the high run off ppm.And if you have low ppm run off, increase dosage next time.As you are growing in soil, keep feeding around 600~800ppm depends on your run off.For pH, try to keep around 6.0~6.5 for both your water and run off.Happy Growing... ✌️
The8thChevronanswered grow question 4 years ago
Sure. The key is to have your feed and runoff to be as close to the same ppms as possible. If the runoff is higher, reduce your ppms. If the runoff is lower, increase your ppms.
Now, it should be mentioned that if your pH is off, this will affect nutrient uptake so always make sure your meter is accurate and calibrate as often as you can stand. Swings in temperature will also affect how much water vs nutrients they take in so keep that in mind too.
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