HELP* plant problem- Culture Under, Current System

Ok, so this is my first run with my Under Current, Current Culture system. The plants ran in the system for two weeks in veg. and were just switched two days ago into flower. After the switch I have started seeing the yellowing start. The yellowing is only on new growth. ppm sitting at 1000 and ph sits at 5.8. All water goes through a filtering system and I did flush all plants in ph balanced water before the switch. My first week in veg ppm sat at 800 and second was changed and ran at 900. Ph was 5.8-6.0. The plants were in veg before going in this system, just in a ebb flow system. Room temps sit between 78 and 81. Water temp is 68. Vertical 1000 watt lighting. Advanced nutrient is being used. If I missed anything you might need to help just ask. Your help is appreciated. Oh yeah and these pictures are during night cycle. Thanks again....

Advanced nutrients is Ph Perfected and you do not need to Ph the water. Show photos of the yellowing.

first two pics show the yellowing... all the tops are yellowing. I think ppm is too high.

the new growth points in these photos are looking very green and productive.

Are you using CO2? If so, turn the CO2 competely off until plants regain there color. Then slowly increase the CO2 ppms every couple days until dsired ratio. This happen to me while back.

Are all the plants yellowing or just the ones closest to the light?

duh...you said all are yellowing. I still think there's a problem with your light setup. IMO, the tops are being bleached by the light. In your last photo the bulb appears to be about 6" above the plant. Usually in a vert setup the lights are hung low and around the plants, it looks like you have them directly above.

MJsponge16 said:

Are you using CO2? If so, turn the CO2 competely off until plants regain there color. Then slowly increase the CO2 ppms every couple days until dsired ratio. This happen to me while back.

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Thanks for your reply. No, I am not running c02 yet. I was also wondering if it would help to run or when should I start burner..

redi jedi said:

Are all the plants yellowing or just the ones closest to the light?

duh...you said all are yellowing. I still think there's a problem with your light setup. IMO, the tops are being bleached by the light. In your last photo the bulb appears to be about 6" above the plant. Usually in a vert setup the lights are hung low and around the plants, it looks like you have them directly above.

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Yes, I think this could also of been an issue. I'm still having a hard time finding the right height for the lights. I have now lowered them so the top of the bulb is even with top of plants, while the bottom is hanging down between the plants.. Does that even make since. Hahahaha....

Yeah I get it.

I dont think your ppm's or PH were an issue. The new setup sounds better, just watch for leaves getting crispy.

i just put mine in flower and they always look the same all the tops get a lime green color this always continues till about the 3rd or 4th week when they really start a good production of flowering in my eyes they look just fine.

redi jedi said:

Yeah I get it.

I dont think your ppm's or PH were an issue. The new setup sounds better, just watch for leaves getting crispy.

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Thanks for your time. For sure no crispy, spotted or browning on leafs. I guess I just notice changes and like to get at any problems before any advanced signs occur. I think it was the lighting. I think lowering the lights have been the biggest change in the girls. Ppm's will be starting to increase again tonight.

drgreentm said:

i just put mine in flower and they always look the same all the tops get a lime green color this always continues till about the 3rd or 4th week when they really start a good production of flowering in my eyes they look just fine.

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Thank you, these girls are gourgous and huge!! Roots are like I've never seen. I'm really excited about this grow. I ran ebb- flow for years and have never seen growth like this. Still holding on to all my tables res. and pumps but I think my girls have found a new home for good.... Second week starts tomorrow.....

no prob man and yes they are very good looking plants very nice system as well. i run ebb & flow for flower was doing deep water culture for veg for the growth is much better now doing ebb for veg too not working out to well going to make some aero cloners for veg and clone all in one hope it works.