Switched from technaflora to GH having issues

I had a mother and clones started in technaflora nutes in a DWC and was running out when I wanted to veg them so I thought I would switch to GH 3 part and give that a try but they don't seem to like it. Im having problems with the lower leaves. Im thinking it might be a calcium and or magnesium deficiency. Has anyone else had this problem with GH and does it look like a cal mag problem or something else?

Or has anyone had problems switching up nutes brands a plant?

IMO- Phosphorus deficiency, I have never seen a plant that dark purple from a (P) Def.
All your variables are in range? pH, nutrient temp, nutrient ppm.


Good Luck on Your Grow.

Shoot a pic of the whole plant and what's your ml per gallon for nutes?

Your p.h. is off. It looks extremely low. Definitely phosphorus/magnesium lockout. Those are the purplest stems i've ever seen!

Thanks, that makes sense. I think it was getting locked out at the top end. Was in the high sixes when I checked it yesterday so I lowered it and it was 6.4 when I checked today. I've got it down to 5.8 now.

I had 5 tsp each of veg, micro and bloom in about 20-25 gallons. The bottle said one of each per a gallon for light veg. I wanted to start out light. It came out to 200 ppm which was working with the technaflora, so it probably was locked out. I added another 5 of each and its up to 300 ppm.

Some pics taken today. They are looking better. I think they will turn around. I just need to quit being so stingy with the PH down.

Looking much better. Purple stems going away. What kind of water are you using tap or ro with calmag?

Tap is under 50 ppm so I just use that.

300ppm is too low for DWC.

Do you add a little calmag to it? I would and get ppm up to 150 before adding nutes. That should be about 3ml./gallon.