Hello sergentjunk,

Before I was use that tap water on my plants, and before I would drink it myself, I'd have a quick "water analysis" done to see what was in it! Cost is about $50-60 dollars done privately and you my be able to find someplace to get it done free.

You did not say what the source of your tap water is, municipal or private well. Well water is typically high in calcium and other minerals and metals. High enough concentrations of certian substances plus items in your nutes my add up to poor nutrient uptake by the plant. Certian heavy metals present in your drinking water my start you to grow a tail, or other health problems.
oldmac Reviewed by oldmac on . Tapwater PPM??? Well I've searched and searched and searched and cannot find the answer to this question: What is a safe PPM level for growing in a coco/perlite mix? I am watering with tap water. It's PPM measures 600 out of the tap. I have no idea what my plants' PPM levels should be at, and cannot find a definitive answer on this. From what I've read I think 600 is a little high. Now of course when I add nutes that's going to go up...most likely double. I've been testing my PPM runoff, and originally Rating: 5