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Solo Cup challenge

Yes get an RO system. It is bicarbonate in your water that is making it hard. When you use a lot of the Nitric Acid to lower the PH it is combining with that carbonate it makes Nitrogen and this is part of your N problem. You could switch to Phosphoric Acid for a while but you end up with an overdose of P after a while.

This is the one I have:
View attachment 1447905



You need to be sure it is soluble calcium sulfate.

View attachment 1447906
Thank you so much friend,you are Always rocking on this forum.And I love Your nutrient sheet tutorial.I Always go there and Watch,hoping some day I can get all those nutrients separated and mix them at right Perfect rateo.
Thank you @St. Tom ❤️
 
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