Plant deficiency problems with 3 month veg in Sunshine mix #4

So I've been having an ongoing problem with a couple grows and cant seem to figure out what exactly is going on. Read and researched as much as I could but still just unsure on the proper action to take.
The last 2 grows have been in Sunshine mix and fed with the full line up of Advanced nutrients. I grew in soil for 2 years before giving this a go. So I'm new to both medium and nutrient line and I knew I was going to have some issues.
Both times when I've moved my plants from the veg tent to the flower tent I have what appears to be either cal/mag deficiency or light burn. This begins to happen within the first two weeks and continues to get worse as time goes on regardless of what I do. On the first grow when I checked the runoff my ph was low. Say I put in 1000 ppm at 6.3 my runoff would come out 1300ppm at 5.8.
I was told by my local grow shop my problem was the long veg time with the medium and using r/o water, and to switch to tap water and it would help stabilize my ph.
So I switched on this grow to my tap that comes out at 150ppm at a ph of 8. I always feed somewhere around 1/4 strenth 2 times weekly, always added cal/mag till mid flower PH down to 6.5 with 20% run off.
I just checked my soil ph with a meter yesterday and it's at 7. Not too sure on how accurate they are but I'm now having the same problem as before with leaf damage. It's not bad yet but trying to correct the problem early.

4 plants total

Seedlings:
-3 weeks in Dixie cups
-None/light nutes no more than 300ppm last week in cups
-PH to 6.3

Veg Tent:
-3 month veg
-2-600w kind veg LEDs on light movers
-20" from canopy under trellis netting
-Vegged in 1 to 5(plastic pots)and then15 gal(smart pot) one month before flip.
-Fed starting at 300ppm up to 900ppm
-PH to 6.5

Flower Tent
-2 ROI 680e LEDs
-2 600w kind LED full spectrum
-24" to 36" above canopy
-Fed starting at 900ppm up to 1500ppm

Enviroment:
Semi-sealed vents 2 times daily 30 min
Co2 generator currently at 500ppm(set up outside of tent)
Day temp 75
Night temp 65
Humidity 55%

So at this point Im not sure if it's a ph issue, a light issue or something I'm not seeing issue. Not sure if I should add lime or run a 50/50 mix of ro and tap to help with the buffering? Or I maybe just try coco. Either way any help would be appreciated!

Which sunshine mix are u using

#4

I'm starting to think I've got too much light for veg.
Checked ph with plain water yesterday. Went in at 6.3 and 25 ppm. Came out at 6.4 and 250 ppm. So ph and ppm seem to be at a good level. Went ahead and fed at 800 ppm.
Think I may put my roi680's on light movers and see what that does. Any thoughts?

This is a difficult one, because overall your plants look great. I too grow in Sunshine #4. I feed at 6.0 pH. 6.5 is the high end.

Because the plants look so good otherwise, it may be problematic to recommend anything, but personally, I'd lower the pH a tad, and add in a half dose of calmag every feed for a bit.

Also, I feed every watering anymore. I started noticing deficiencies when I don't. I'm currently running with General Hydro Flora (but am in the midst of switching nutes which is irrelevant). I would suspect the AH would buffer the pH a bit, but I've never used the stuff.

Again, because the garden looks healthy overall, take what I've said with a grain of salt. One thing I'd suggest though, is only change one thing at a time, so that you're aware of what made things better, or worse.

Please do keep us posted.

spek9 said:

This is a difficult one, because overall your plants look great. I too grow in Sunshine #4. I feed at 6.0 pH. 6.5 is the high end.

Because the plants look so good otherwise, it may be problematic to recommend anything, but personally, I'd lower the pH a tad, and add in a half dose of calmag every feed for a bit.

Also, I feed every watering anymore. I started noticing deficiencies when I don't. I'm currently running with General Hydro Flora (but am in the midst of switching nutes which is irrelevant). I would suspect the AH would buffer the pH a bit, but I've never used the stuff.

Again, because the garden looks healthy overall, take what I've said with a grain of salt. One thing I'd suggest though, is only change one thing at a time, so that you're aware of what made things better, or worse.

Please do keep us posted.

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Thanks for the advice. Its is tough when having any issue to not want to fix it...usually with multiple remidies.

I feed every time as well and just try and track what goes in with what comes out as to not over feed.
Have you ever vegged this long in Sunshine #4?
Just curious if you've had any ph issues from depleting the lime in the mix.

This isn't exactly what I was planning but I ended up selling my house and I'm now moving in a month. So flipping to flower right now is just not happening. Hope I can keep them in check this long!