That leaf a while back - looked like potentially spider mite damage - be sure to next time check for bugs as well as nutrients.
I think your PPMS could of been higher.
The high heat from the HPS is good - just like the radiant sun.
You need a stronger fan for the cool tube - using a Hydrofarm 400cfm 6" fan for 90$ you'll cool that bad boy with zero worries plus it'll increase your exhaust cfms which passively increases your intake so you will constantly have fresh air and cooler air. If you have a carbon Filter
Are you making the A/C cool the room with the tent or just the tent? Exhausting the heat out of hte whole room will make a MASSIVE difference.
I say run the light at 100% and just lower the plants or raise the light.
Ganja grows in Afghan... its fukcing HAWT AND DRY and we always treat it like its a bromeliad growing in some tropical jungle.
Its a weed - tough plant
Now regarding your grassy smelling weed. Be there.
Dry it longer. Next time you harvest take off everything with NO FROST.
Leave the rest on and dry em in a cool high air flow "dark" if you can place. Give them 5 days if its hot n dry say 80F and 40% RH.
Give em 7 days it ifs 75F 50%RH and 10 days if its 70F 50%+ RH.
You can tell by the stems - the big stems wont' bend - they will snap - dry.
That point you take out ur non stick parchment paper - put the dry buds on there and do what I call the "double standard" trim. Basically take all those frosty leaves off you might have taken before and stash them for some concentrates - butter - w/e you want... tea.
Now you have ready to smoke buds They should smell strong too and the cure is only going to make them better.
Your root picture btw
You doing a fine job brother - nice grow - its fun!
Woot! Looks like my storage just kicked over.
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The 600w HPS Cooltube is ready to be kicked on - just waiting until the end of the month so they are a bit chunkier
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They have been pretty hearty so far, but there are signs of problems. Cal/Mag deficiency and PH fluxuations? I'm not sure. They are a bit too yellow at the tops I believe...
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Also - what causes purple stems? Genetics? Nutrient issues? Temperatures? In a previous grow, one plant had this quality... guessing it was genetics then. My last grow, with these same genetics, there were no purple stems. The mothers started turning funky colors... nutrient buildup? rootboundness? temps? ph? I don't know, but I'm not stressing too much. It would be nice to feel I really understood hydroponics though! haha
Edit: After a bit of reading I found that a lack of nitrogen can cause stems to turn purple. Am I going too easy on the nutrients or was the out of balance PH causing nutrient lock-out? whoa, I might be starting to understand this!
This is my second hydro gro, so if you have suggestions or tips, let me know! Thanks for watching! Keep it green
cool grow tho i bet if you had filled up with the leca rock to the same height as the netpot's i bet you would have up'ed your yield atleast 30% look's like that root zone could have used some air try and throw some leca rocks in the before you start veg's next time man
keep it up