Rolled in leaves and kinda pale and started to curl up

Over watering for sure water once every second day or 3rd day in coco or slow drip. I use rockwool and clay pebblea dtw style much like coco i water every 4th day or 5th when babys and in veg and flower every 3rd day i could go one day longer here and there they dont mind last summer i went 5 days in between a few times and i thunk it just makes for more resinous bjds. Sry a lil of topic ur roit zone needs oxygen and so does the soil around it if you get anaerobic microbes you will get a lil but of root rot go to amazon and get REAL GROWERS RECHARGE 8 OZ its cheaps af but is great its beneficial microbes that will help with ph buffering and all kinds of stuff check out the future of cannabis project on youtube or dudegrows they make and sell the recharge its microbes like mammoth p or great white but more diverse and ALOT cheaper GL growmie

Btw. I am curious is anyone using backing soda to get the PH up?

Cheers guys, I will check in back tomorrow and will replace some more of the nutrition solution with fresh tap water to get the PH to 6 if it isn't there already. How could it be overfed, it was the first time adding the nutritions to clear water, shouldn't that be fine? It was even less then recommended by Hesi. No idea about water temps thou, I am waiting for the thermometer, until then I fear I gonna be flying blindly, but I gonna dial temps down a bit to be a bit more on the safe side there.

Your pH shouldn't be dropping like that. It's likely being overfed. Cut back all NPK based nutes for the next week. If you're not using nutes yet, then your mix is probably too hot.

Yeah, I know, the PH level is giving me headaches. For example it has been at 6.5/7 and after adding 3 ml of Plagron ph down it didn't change, after adding 5 ml more it suddenly went down to PH 4 and we are about a reservoir with over a hundred liters. So I didn't want to mess it up further. This time I have removed 12 liters of nutrition solution and added 6 of fresh tappend water (PH 8) I am using a liquid PH test kit, but I have ordered test stripes to double check in future

Ph of 5 for soil is far too low bro

Ph of 5! So you were in the 4's before.......thats waaaaaaay too low, you want to be up in the 5.9 area. Correct the ph and see how she looks in a week. Happy growing.