I forgot about that...

....a pretty old quote there, are you sure your only as old as dirt?:stoned:
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