leaf burn is related to which element toxicity ?

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Reduce nitrogen. Blanching or dead tips are the sign.

I have to wonder why a person is mixing their own when they're obviously not equipped to do so? Not trying to be an ass but nutes are cheap.

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baxbax said:

everyone's situation is different

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Explain a bit more and get better help. You don't have to identify yourself or exact location you understand.

P will burn your leaf tips pretty easily.
the site strips data from photos. some pics would help, in normal light.
if you want quality help, more info is required. what are your temps, rh, what nutes do you use, what medium are you using,
what kind of lights and how far away...the more you tell and show us, the more help we can be

Leaf burn is related to damaged roots.

Roger A. Shrubber said:

the site strips data from photos

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I still do it manually anyway.

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humic and fulvic acid make it a lot easier for plants to absorb nutrients, anytime you add them, you have to cut back on the nutes a little.
what nutes are you using, do they already have calcium?

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why are you using phosphoric acid? why not get a bottle of ph up and a bottle of ph down and use what the rest of the world uses.
ph down IS phosphoric acid, buffered so it won't burn your plants, unless you douse them with it

where are you from? i feel we're both missing something in translation

This guy is a lost cause.

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maybe, but i hate to walk away from a broken thing till i break it some more

what does that come out to as ec or ppm? sounds like it might be pretty hot

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