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I believe the white powdery substance is salts & minerals which maybe causing the leaf burns, are the nutes spraying on the plants, or are you foliar feeding or spraying the plants? try washing the leaves of one plant to see if the powder dissolves and whether it returns
whats the PH of your tap water and the res PH your plants are also showing a couple defencies I believe maybe PH related
if your res is coagulating...........thats not good......... change it out
what nutes are you using, check to see if they contain micro nutes
lower your lites the seedlings are streching to reach the lite
Last edited by Ganja Guerrilla; 09-06-2007 at 10:30 PM.
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