Big Plants, Little Buds

So it's nearing the end of week 7 of flower for these super lemon haze girls and it seems like i've been waiting forever for this "swell" of the buds to come on. The strain is listed as a 10 week finisher, but the majority of the buds look more like week 3 stage at this point and im starting to worry that there is something wrong. With only two weeks left before flush I doubt there is much I can do to help them at this point, but I'd like to know what exactly went wrong. I have another tent running the exact same DIY under current system, with the same nutes, just a different strain(pineapple express) and it's doing much better and looking like it's going to yield almost double what this tent has. Here's the history: vegged for 6 weeks with hardly any problems, ppm dropped consistently, they drank like crazy, and grew into huge plants(huge in my experience). The stalks of most of the girls are nearing 5" in circumference. I topped each one a couple of times and scrogged them as best I could. Being my first time with scrogging, I ended up with a fairly uneven canopy, which I think may be a contributing factor to the small buds. I also believe high temps early in flower(78-82) caused a lot of stretch which can be seen in the pics. I also defoliated a good portion of the fan leaves through late veg and early flower, finally lollipopping the entire bottom third of the plant. The strain seemed to be touchy with nitrogen, and I had what looked to me to be a nitrogen toxicity late in veg. I lightened up the nutes and things went back to normal for a couple weeks.

Early in flower, around week 3 I think, they starting to develop the same clawing leaves as earlier in veg, indicating another nitrogen tox. I flushed for 48 hours with plain ro, and the leaves improved slightly. As flowering continued I was never able to get control of this clawing issue, and some of the leaves are now standing straight upwards, especially the ones near the light, while some of the lower ones are still clawing downwards. The light is 1000w and I know it's closer than the recommended two feet, it's more like less than a foot from the tallest buds in reality. I'm in a tent and unfortunately with the light mover I can't raise it any higher. I'll attach pics of this issue. Along with this, I have seen twisted tips on new leaf growth within the buds, very small buds, amber pistils, and deformed fan leaf growth. The room conditions could also be a factor, the tents are in a room in a cool basement (60-65F) I have had the main doors of the tent open in an effort to keep humidity down, as well as the the entrance and exit door of the room itself open with a large fan pushing air out one door and pulling in from the other. This effect has cool air coming into the tents keeping the room itself around 65-70F, the tent temps at 70-75F, and the canopy temps slightly below 80F. Could this variation in temps at different parts of the plants cause growth issues?

My main issue which i'm sure is every growers main issue, is the yield. The buds are tiny, some not even larger than my thumbnail, i'm ultimately trying to figure out if it is the overall lack of light(1000w on light mover in 4x8 tent), nitrogen tox, canopy height, temps, or even the ph. I do not trust my ph meter at all(Hanna ppm/ph combo grocheck) the thing doesn't seem to hold a calibration whatsoever and reads a different ph every time I attempt to calibrate. I've been double checking it with the old dropper and water sample method but you can only be so accurate with that.

I also forgot to mention the nutrients, in flower it seems like I was never able to make it to the suggested ppm from Current Culture. I maxed at only 600 or so and the last two weeks I saw ppm rise and had to remove and dilute some of the solution to bring it down. I got some minor tip burn, but never let it do any major damage. I'm overwhelmed with all the different factors that could lead to these super small buds. I know it's a long thread and I thank anybody early who has the patience to take on this problem with me. Also forgot to mention, some of the larger buds have swollen calyxes with amber pistils, I don't really know much about hermies or pollination so I attached a pic just to verify nothings wrong. Like i said, I think it's too late to help this group but let me know what I should change to make this not happen again.

Main Factors:
Not enough light?
Nitrogen Toxicity?
Ph problems?
Heat Stress?
Cool air in room?

Hydro Growers:
1. Are you growing from seed or clones? Seed - feminized
2. How old are your plants? 13 Weeks (6 veg, 7 flower) 10 week strain
3. How tall are your plants? 24" - 36"
4. What type of hydro system are you using? RDWC DIY under current
5. What brand/type of nutrients are you using? Cultured Solutions Full Line
6. What is the Ph of your nutrient solution? 5.6-6.0
7. What is the PPM/EC of your tap water? Using RO ppm:14
8. What is the PPM/EC of your nutrient solution? 550/1.1
9. What is the temperature of your nutrient solution? 65-69 F
10. Does your PPM/EC show a rise or fall when you do your daily PPM check? About 10ppm drop daily
11. Does your pH show a rise or fall when you do your daily check? Erratic depending on nutrient temp but overall rise of .1 or so daily
12. Do you foliar feed or spray your plants with anything? No
13. What kind of lights do you use and how many watts combined? (HPS, MH, fluorescent, halogen, incandescent "plant lights") 1000W ventilated HPS on light mover
14. How close are your lights to the plants? 1ft
15. What size is your grow space in square feet? 8x4
16. What is the temperature and humidity in your grow space? 78 F canopy - 74 F room / 55% Rh
17. Have you noticed any insect activity in your grow space? Occasional fly or small flying bug
18. How much experience do you have growing? New to hydro, one soil grow

Looks liek you're using too much nitrogen....... you don't wanna use a lot of N during flowering... this will happen.

Yeah look at the dartk dark green leaves curing all over the place.... this is almost certainly Nitrogen Toxicity.

flush flush flush!

That's a pretty good description! Just one question, you are using RO water but I didn't see that you are adding cal/mag back to it. Do you have some cal/mag in your water?

I really don't see the over feeding or nitrogen toxicity nor would expect to at 600ppm, just a little heat stress but you already know you are running too close to your light. I really don't see you being done in 3 weeks but things can change fast so who knows. I've grown this strain and got what I thought were average size buds but you could have a different pheno type or even a different version of SLH so that doesn't mean a lot. I've grown other sativa dominant strains and the longer the inter-nodal spacing the smaller the buds in my experience, sometimes it is just genetics. I think you'll end up with some good smoke if not huge buds.

The swell already would of happened..may not yield like you thought?..IMO.....just keep smiling....you will have smoke soon enough!

If anything, your leaves look a little oxygen deprived (overwatered). Maybe getting your rez temps down and adding another bubbler would help?