What is causing my clones to do this? Been using peat pucks for over 20 years with almost 100% success. Lately they start to look like this and don't even start to root. Leaves eventually blacken and clone dies. Have some in bubble cloner doing the same. All I can think of is I recently moved , maybe something in the water. Tap water is ph 6, ppm 140. I tried a batch using ro water...same thing. ???
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