GMSgrowsanswered grow question 4 years ago Use a ph and tds reader, check your runoff and see where your at. Is your ec low or high, is your ph in the right range. This is how you keep an eye on what going on with your babies. It tells you what needs to be done. Just blindly adding anything is very detrimental to your girls especially if you already are overfeeding and lockout is starting. Or ph is wrong and elements not available. Cheers friend