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Thread: Stem failure
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post #6 of (permalink) Old 04-01-2013, 04:51 PM
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Join Date: Feb 2010
Location: Newbury Park, CA
Posts: 3,949
Lower leaves developing holes can be a potassium deficiency. Try doubling up for a week to see if it stops. Old leaves will not recover! My stems needed more magnesium, when I dose 3 tsp after each water change in my 200 gallon system they are healthier. I did that on a hunch after increasing flow and bumping CO2 did nothing good. My GH ought to be fine but a bit more was better. Increasing the hours the lights were on was another experiment that succeeded. Keep track of how much you are dosing and change one thing at a time to see what happens. It can happen quickly as you have already noticed.
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