the Bubbler is a 50 litre black container with lid wrapped in Panda
i have 2 x small air pumps on flexible air stones running 24/7
i have been on 24 hour lighting for the 1 st 3 weeks
i have just gone to 18/6 for the rest of Veg
1st week it was at about 280 ppm in an aero cloner
2 nd week i bumped up to 420-560ppm in bubbler
3rd week i was 700 ppm.
res temps has been close to stable 22 c
room temp has been high 25-32 C
i have a 1m x 1m x 2 m grow space with 600 watt hps air cooled
250 cm fart fan running 24/7 and now have 12 x 2 inch passive holes
i think it was getting way to hot so i cut some more holes ,i had 4 x holes 1st week , then 6 x holes,2nd week now 12 holes in 3 rd week
The problem is i have lotsa new growth , but the old leaves after 2-3 days get black/brown spots on it then eventually dry up and are brittle to touch.
This may have been as i was spraying it with ph balanced room temp water when i had the light at 2 foot (1st week), its now 3 foot or 1 metre away from the plant now .( i since found out i was supposed to spray when ights were off DOH !)
Also it was also always droopy (like under/overwatering), i removed the dead leaf material and its kinda tipped it into a real bushy little bugger , but the older leaves at the bottom are dying.
I dropped the water to 1 inch below the bottom off the net pot as there was about 6-10 roots hanging.
The roots have now got like ladders across them . i changed the res today and backed it down to 280-420 ppm
This is all experimental atm and its failing dismally so any and all help is much appreciated.
Thanks in advance
Edited by Lucian, 23 May 2004 - 03:07 PM.