catweazle1 Posted January 2 Share Posted January 2 4 hours ago, MrSlatersParrot said: I ask because I used to work at a plant research unit where we made up our own plant nutrient. I'm no kind of chemist, we used a recipe which was a modified Hoagland solution and we used HCl as the pH down, I believe it's quite common in the science world precisely because chlorine isn't a major nutrient. We grew loads of different plants for researchers, never heard anyone have a problem with it. I will investigate. Thanks. Link to comment Share on other sites More sharing options...
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