leaves curling up

try giving nutes every other feeding.

i've only had that problem when i wasnt giving enough nutes. what is the ratio of npk it's getting?

also if the plant is budding very quickly it somtimes makes the leaf tips curl. and of course at the end, but 10 days in, thats not possible.

it could also be your ph. although 6 is a little bit low i usually have it at 6.7-.6.8. it more than likely isnt your ph though.

yeah, try to lower your phosphate lvls to 30 ish

forget the nutrients. water more often. that's the problem. Plus, check the temp. if it's too high then all the water you give will transpire.

as i said, try giving 1l/plant every 2 days. see the change. plus remember: active ventilation dries the leaves faster than the only high temperature. your leaves are curled up in the attempt to lessen their surface, to keep the evaporation at minimum. it takes a plant to get to a noticeable size to start dehydrating in the same conditions it was ok while it was smaller. in my experience the affected leaves did not regain much of the healthy state but new ones were ok. etc. but first water more often. good luck

yea, i saw that on first post. but try giving 1l instead of 1,5 and 2 days distance instead of 3. damn, i don't know how to attach pictures to make myself clear.

Don't add more nutes. If it were me I would just water for a week and not feed them. When the leaves start to turn light green then I would start feeding again.