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Old 10-04-2018, 01:22 PM   #4 (permalink)
edwmax
 
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Default Re: Is this a disease or damage from chlorinated water?

Chlorine (Cl) and Sodium (Na) both will cause damage to the roots long before becoming visible on the plant leaves. Chlorine causes chlorosis at the leaf tips and margins starting as looking like sunburn. ... So what was the chlorine considerations of the pool water? ... About 1000 ppm or more is known to cause problems.



Sodium blocks uptake of essential elements causing deficiencies.


The black spots are looking more like a fungus or bacterial problem. The black mid rib seems to suggest the fungus is spreading through the sap. ... Try spraying the plants with a Bordeaux mixture (https://www.gardeningknowhow.com/garden-how-to/info/diy-bordeaux-fungicide.htm )
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