Just checked my tap water PPM with the TDS meter and it's a nice and low 10PPM!
Just checked my tap water PPM with the TDS meter and it's a nice and low 10PPM!
What are signs of a deficiency of Mg +2 in plants and how long does it take to start showing that the plants need supplementary Mg +2? Can I use epsom salts (MgSO4, I already have a 500g bag) to help with this and how much would I need to add to a 5 gallon drip ring sys. with approx. 15L in it to get the correct amount for optimal growth?
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