Deep Water Culture problems

[SensiGuy]

I running about 1500watts hps with a ph at 5.8 Im using gh solution. I have a ppm meter and it reads between 800 -1000ppm. New growth has yellowing tips I dont know whats up, I think its some kind of defieciency but I lack the literature as someone stole all my good reference books but If anyone has an idea i sure like to know.

 

[octobong007]

http://www.mjp.com/ic/showthread.php?t=11688 hope this helps, post your findings. i'm getting ready to get into a dwc grow and working on the learning part. all the luck to ya.

 

[0b1kinsmokey]

you need pics bro.

most people go to high with Dwc too, 1000ppm may be too high for their current age (need that info too)

i like to think of dwc as Not, deep water culture, but Direct water culture...there is much less of a buffer and the direct oxygen makes uptake much more effective and there for more harmful if too high.

wat may be good for a pheno in Ebb and Flow at 1200ppm could very easily be detrimental to that same Pheno in Dwc. more info needed tho, definetely- if u dont find wat ur lookin for, GL

 

[gangalama]

you need pics bro.

most people go to high with Dwc too, 1000ppm may be too high for their current age (need that info too)

i like to think of dwc as Not, deep water culture, but Direct water culture...there is much less of a buffer and the direct oxygen makes uptake much more effective and there for more harmful if too high.

] Very True. U got2 gradually build up the amount of food your using, start small. A quick flush with a little B+ should cure most nutrient problems.

 

[0b1kinsmokey]

definetely, people seem to overshoot ppm in dwc alot

 

[sponge]

sounds like magnesium or iron, maybe sulfer deficiencies. try a half teaspoon of epsom salts per gallon nutes.

 

[BuddyLuv]

Mag, calcium, iron, etc... deficiency cause bronzing in the middle of the leaf and it works it's way outward. It doesn't start at the tips.