Stoney McFried
Well-Known Member
90 is a little too much unless you're running cO2.
Thanks so much guys for the help!
I have been testing the PH twice daily (morning and night since a week old) as I had read elsewhere that the dwc method can have fairly quick and dramatic PH changes. The PH has ever only left the 5.8-6 zone (went to 6. in the very beginning when I first began to add my nute mix.
I try to keep the ppm measurement around 800 max as this is my first plant cycle.
As for the Heat, there is about a good foot of cool/pleasant air above the plant tops before the heat of lamp can be felt.
The small yellow patches appear to be on the lower leaves but also randomly scattered on the sativas, but the indica seems to have the main issue on the older leaves. the older leaves are also dark green and lack elascticty. So magnesium issue might make sense here?
As for the sativas, they are in the same container which is 36" by 18" and they are spilt with a divider which breaks above the root line they cant tanlge so water and air flows around the entire container without the roots being able to get tangled.
i think the plants have alot of oxygen (bc the sativa contianer has a 60 gal double outlet air pump with 8 air stones on the bottom of the container. Indica as 1 20 gal pump with 3 air stones) and all the roots are soft, white and seem to be still growing well.
The main stems are very green with small white hairs and seems very strong on both plants. The smaller stems also seem strong and healthy and all plants have lots of new bright green leaf buds still growing.
The temp in the room is around 90 degrees, but has fairly high humidity (i live in a humid area) and the fan blows air right through the plants and below the lamp out of the door. so it doenst feel like 90.
I decided to completely flush each container with water and wipe of any excess minerals. I gently washed each plants roots with fresh water also before re-filling the containers and putting below 600ppm of nutrients.
I also raised the light by a foot and managed to get the temp to 78 by keeping windows open.
Re-tested Hp and set each container to 5.6 and moved plants slightly out of direct light from the hps.
Gonna go check on them in around mid day.
I really wanna find out whats causing this before my widow and black pearl come nxt week hope this works
thanks again guys!