What deficiency is this? [photo inside]

Blitz35 said:

I guess try and see how that works..personally, i wouldn't touch tap water like that, as i don't feel like running in circles trying to pinpoint a problem. Your cal to mag ratio is ok, but the bicarbonates are very high! Chlorine and sulfur are a bit high as well..chlorine can bond with the sodium and form sodium chloride...table salt! With that much rain water..why not just use rain water and leave the toxic tap alone? With such high levels of 'bad' cations, you will be chasing your tail trying to fix calcium, magnesium and potassium issues, not to mention some micros. The excess chlorine and sulfur anions can also interfere with nitrate uptake.

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Rblade said:

now i'm understand. The bigger problem could be the tap water..

One more question. When I buy coco the next time, could wash them with tap water, or need wash it with rain water + calMag 0.4 EC ?

Because if i wash the coco with rain water ... i dont have so many liters..


I need advice for now. For my current crop. I washed the coco the last week. With tap water. What you recommend me ? need wash it with rain water? and feed then with a normal dose with rain water?

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Blitz35 said:

The reason to wash the coco is to get rid of the likely sodium that it contains. If you use your tap, it won't clean it that well, as your tap already has high levels of bicarbonates and sodium. Once you wash it properly, you water it with a cal-mag solution so the coco can be buffered. Scroll down to 'Why does it matter' and maybe it can help you understand better the reasoning for all this.

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