Amnesia Auto & OG Kush in 2x2x4 Tent

SUMMARY: It was my intention to have the light cycle as 18/6 throughout the run however I realized on Day 14 that I had not had the timer on and so the lights had been on 24/7 since sprout! I am irrigating every other feed and feeding every 48hrs and so they are only receiving nutes twice per week at this point. The input pH is between 6.0-6.2 and my humidifier is only set at 25% power providing a RH of around 55-60%. I saw some slight curling upwards of the leaves on the Amnesia this week which I believed was due to over watering however would later come to realize that it was likely heat stress as temps reached an average of around 30°C. Feeding volume has been 500ml per feed on average however I finally watered until runoff on Day 12 giving 4.5L of nutes each to the seedlings. On my next grow I will aim to water/irrigate the seedlings to 20% runoff once the seedlings are established at around 4cm in height. DAY 8 ------- Thursday 10/09/2020 08:30pm Ran out of both water and Nutes and so made some more. 5L tap water at pH 6.0 and 5L nutes at pH 6.2. Thursday 10/09/2020 09:00pm The coco had dried out on top after not watering yesterday and so I stuck my index finger in the coco up to my knuckle. It was a little damp at best but not wet and so I gave each plant 500ml nutes. I also increased the humidifier slightly from about 10% power to 15% power. The plants haven't grown any taller but the leaves have gotten a little bigger and 2 new leaves have developed on both plants. [25°C/57%] DAY 9 ------- Friday 11/09/2020 07:00pm The coco has not dried out completely and sticking my index finger in the coco right up to my knuckle again the coco is a little damp but not wet. Unfortunately though whilst the OG Kush seems healthy enough (perhaps could do with more colour tbh) it does look like the amnesia is not doing so well with the leaves starting to curl up at the edges ever so slightly. Google and growing communities suggest that this is caused by either heat stress, extreme humidity, or over-watering. As the environment has been good and constant and I've been all over the place with the water quantity I think its safe to say it is a case of over-watering. I have reached out to a couple of communities with pics for further help with diagnosing and fixing the issue. I've also turned the humidifier up again to about 20% as the humidity could be a little higher on average [23°C/66%] It's so difficult to gauge water requirements, everyone has such varying opinions, some say you must always water to runoff, some say you shouldn't, but the takeaway I'm holding onto is that you only want to give your plants enough water for 24hrs in order to allow you to feed them daily. So I think I have to "build up" to watering to runoff as if I did this right now then it would probably take 2-3 days for the medium to dry out if not longer! DAY 10 ------- Saturday 12/09/2020 06:00pm Plants look ok, same as yesterday with no growth. I was advised to give the plants enough water for 10-20% runoff next watering and so I gave the plants all the water I had prepped which was 2.5L each however there was no runoff at all; in fact the bottom of the fabric pot was bone dry after watering. I have also switched the humidifier off and switched the dehumidifier on to 55% to reduce RH as advised online to tackle the slight curling of the amnesia leaves. DAY 12 -------- Monday 14/09/2020 08:00pm I think I have misunderstood the nutrient schedule and was supposed to start week 1 (nutes) upon sprout whereas I didn't start giving nutes until day 4 after sprout and so I think I may have been underfeeding them with too low strength nutes. The leaves are perhaps looking a little discolored though I'm not sure, but I feel that whilst the plants are doing well enough they could be doing much better. With that being the case I decided to give the plant all the nutes that I had premade however this wouldn't have been enough to produce runoff and so I made another 5L giving me a total of 9L nutes. I slowly gave each plant 1L at a time over a period of roughly ten mins until all the nutes had gone. I think I started to see runoff after about 3.5L. Giving each plant 4.5L produced just over 1L of runoff from each and so I will just give 3.5L each next time which should produce closer to 20%. The next time I make nutes I will make them to the strength of week 3 and they will likely be due nutes next by Thursday which will be the start of week 3. The runoff from the Amnesia was pH 6.1 and the runoff from the OG Kush was pH 5.9 and so I'm in range (5.5-6.5). The OG kush measures in at roughly 7cm now whilst Amnesia is a bit of a short arse at only 4cm. DAY 14 --------- Wednesday 16/09/2020 08:30pm I discovered today that I had switched the timer off on my lights and so the plants have had 24/7 lights since sprout. This plus the high temps the last few days (30°C avg with the plants being above 30°C for at least 5hours) has caused heat stress. I have combatted this today by switching on the intake fan to cool tent down (27°C high) and opened the top of door to let air out to combat positive pressure from intake fan. I gave each plant 3L of water which produced 1L runoff. I will be giving 2.5L each tomorrow hope to see 500ml runoff which will be 20%. The Amnesia runoff was pH 6.1 and the OG Kush runoff was pH 6.3. [25°C/58%]