roots exuding toxines?

ogenko said:

a question for the more advaced botanists
i read in one of the nft "bibles", that tomato plants exude a toxin through their roots that will cause a root die off sometime in the life of the plants if not rinsed out properly
i have 2 nft channels; in each channel are 2 -3 mendo afgoo plants and one sour diesel plant
the sour diesel fan leaves begin light green and lose all their green quickly while the medoos seem to be happy as bigs in shit
could this be the result of toxin build up in my system
actually it could be a lot of things since i decided to not do a res change (experimental) for over 57 days of thier life
i finally gave in and did a res change and rinsed out the tracks with fresh water to see if it would alleviate the symptoms ive been seeing

pics in my sig link
peeeeeeeeaaaaaaaaaaaaccccccccccceeeeeeeeeeee

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ogenko said:

ok here's a funny thing though
the yellowing on the Sour D's began from day one
when the res was fresh
and the 1 Sour D that shared a hole with an Afgoo showed the yellowing much worse than the Sour D that had it's own hole
the Afgoo's have no such symptoms
i was thinking they either have different nute solution "likes"
or the afgoo roots are exuding something to claim thier territorry
anyhow i will try to stick with the tried and true from here on out
thanks for the ideas though

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