Yellowing Leaves

[midwestbluntman]

Well this is going to be a bit of a pita with no pix but i'll throw it out there and see if anyone bites.
The plant is G-13
Recirculating dwc setup
under 250 watt flouro's
GH 3 part nutes
Temps are running high 80's
RH is at 47%
PPM's at 800
Ph is still kinda low running about 5.2-5.6

What i think has happened is ive overdosed the H20,I had a green film along the bottom of the res so i added the h20 at 15ml intervals.the system hold about 5 gal total,and ive added 15ml approximitly 4 times the past week.The green slime is gone but im left with a very sickly couple of G-13's.The tops of both plant are a bright yellow but the leaf veins remain green almost like a mag/nit problem.as it moves down the plant it changes to a pea green then futher down the plant it starts to regain it lush green colors.however the lush green is all dying,getting all necratic[dead]spots in the older foliage and eventually falling off quite crispy.
Ive decided to give them a 24 hour flush and change nutes,pehaps lowering the ppm a touch to see if this will help.here is a a pic of a slight variation of what im talking about except mine are so yellow at the tops that the lights reflect off them http://www.homegrownbud.com/forums/attachment.php?attachmentid=123&d=1132012333im talking almost canary yellow.

can anyone confirm the H20 overdose or maybe a suggestion as to where to go from here.

[Shadows]

H2O2 in excess will burn the roots severly. Have you noticed a loss in root mass among your sick babies?

What phase of growth are you in, and at what point did the plants begin showing the issues?

[midwestbluntman]

sorry ND im in veg about 4 0r 5 weeks,not exactly sure how old they are.it all started alittle over a week ago.it started off as a lime green color then it progressively got more and more yellow.I noticed a green slim build up i assumed it was from lack of light proofing so i drained and cleaned the tanks and light proofed the tanks,refilled with new nutes and added 15 ml H2O2.a couple days later they were still turning yellow and there was still traces of the green slime so i added 15 ml more H2O2.Now that you mentioned it the roots are kinda brown in color.well last night i drained and refilled with plain tap,to allow a decent flush and planned on re nuteing tonight.

[CB]

res change and flush for a few days:D

back off of the h2o2

watch for new growth

ppm seems a bit low for this stage of the game as well as ph........give em some N when ya refert and let the ph drift up

[high2dsky]

simple enough........:rofl2:

[midwestbluntman]

res change and flush for a few days

back off of the h2o2

watch for new growth


Thats the plan man,been flushing for 48 hours now,im going to drain and clean again and nute it back up tonight

ppm seems a bit low for this stage of the game as well as ph........give em some N when ya refert and let the ph drift up

they have been holding at about 800ppm for a good while now but they havent really asked for more.one day the ppm's might be up 20 or 30 then the next there down 20 or 30.I dont get a lot of Ph drift with these gh nutes,they seem to be pretty stable.a huge drift in the past was like .5,run about Ph6 and the farthest it has drifted was like 6.5 6.6.I was trying what was suggested in my journal at the old world and setting the Ph at 5.5 and let it drift up but then this has happened.i guess it could be a ph issue but i didnt think 5.5 would lock out the N so im leaning toward the h202 being the culprit.might be a combo of the 2 ,live and learn man,thats what makes this hobby so much fun.