understanding light

[Luci_ferson]

its not as hard is it sounds. those books show you how to make the basic feeds using cheap components.
the rest you would work out yourself by the time you've finished the book.

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basically if you get the NPK right and the TDS but the ph is wrong you use a little vinegar to alter it and away you go. but you need to understand water chemistry first .
its best for most to just use traditional cheap stuff. ammonium nitrate , phosphor , iron etc
most people don't really want to go too deeply into water chemistry.

growing organic hydroponics comes with a lot of small complications.
plants need different nutrients when flowering , more phosphor and less nitrogen.
and when growing they usually opposite , you always need to know the plants requirements.
getting organic feeds to hold their ph stable is difficult if you don't understand kh

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and a feed at the wrong ph wont do the plant any good even if the nutrients are right, because it cant absorb them and process them properly.

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in liquid feeds the tds and Kh is important as you cant hold a stable ph without a high kh.
but if you add organics (nutrients) to the feed its tds gos up and its kh will come down making the ph remain stable.
what really happened was the organics were acidic and tried to lower the ph , but the Kh acts as a buffer and brings the ph back up but lowers itself.
you need to keep your feed at a ph that is suitable for the plant.
this can be difficult to do in some softer water areas so you would need to then add calcium carbonate . this would raise the ph back up if it has dropped too far.

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its really all about knowing your water if you want to grow successfully with organic hydroponics.

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mr G Mayfield can explain it in better terms.
ive probably just made it sound a lot more complicated than it is.