Durksta said:

View attachment 809909 im growing 4 autos (which are very happy) I’m using a needle drip system firstly when I do my nute mix my ppm are around 500 until I add ph down which lowers the ppm by about 100 (186ppm is my tap water) so around 400 - 450ppm after ph down. Is this normal

Secondly during the week between each water change the reservoir evaporated I need to adjust the ph but I don’t add more water because the ppm decreases, it doesn’t increase as the water becomes more concentrated. I read my ppm this morning and I’m at 180 which is less than my tap water to start.I last changed the water Tuesday I have at least 3 days before i change. Are my plants eating everything? I’ve i go higher on the nutes I’ll burn my autos thanks for any insight

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MidwestToker said:

First, what are you using for pH down?
Second, is that anything you add should not drop your ppm it should raise it.

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Durksta said:

Im using gh ph down

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MidwestToker said:

Then something is not right, No way your ppms should go down adding Phosphoric acid.

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MidwestToker said:

What are you using for pH and ppm monitoring?

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