Amnesia Auto & OG Kush in 2x2x4 Tent

SUMMARY: The OG has grown so much these last couple of weeks and now towers over the Amnesia like a giant. It is really starting to flower now too which is good because looking at how slowly the Amnesia is growing over the last 2 weeks I really can't see me getting the 1.5-2oz yield I was hoping for come harvest. Both plants doing fine and coming along ok. OG now drinking 5L every 48hrs and the Amnesia drinking 3.5L (though I'm still giving 4L). I switched up to the GWE updated mid bloom nutes for the OG towards the end of the week and continued with the Sensi Garden peak flowering nutes for the Amnesia this week. I continued with some light defoliation this week removing the odd lower leaf and some fan leaves covering bud sites that I couldn't tuck. DAY 72 -------- Friday 13/11/2020 I fed the plants, updated GWE early bloom nutes for OG and sensi garden peak flower nutes for Amnesia. OG (in) = 5L pH 6.5 OG (out) = 1.3L (26%) pH 5.6 [0.9 drop] Amnesia (in) = 4L pH 6.5 Amnesia (out) = 1.5L (38%) pH 5.7 [0.8 drop] The OG is really starting to flower now especially at the top where it is very close to the light. I'll be very surprised if it doesn't suffer light burn but nothing I can do as the light is as high as it can go. The pH of the medium is slowly rising for both and both plants are looking healthy with no leaves dying off or yellowing. I bought a USB microscope and checked the trichs out, all clear from what I can see which is great because I really want to push this for another 4 weeks if possible (15 weeks total) to give the OG a chance to bloom. I like a good couch lock so providing I can keep the plants alive and keep the humidity low enough to avoid bud rot I think it might just be possible. DAY 74 -------- Sunday 15/11/2020 I fed both plants, GWE updated schedule Mid-Blom nutes for the OG and some more Sensi Garden Peak Flower nutes for the Amnesia. The humidity has been steady at around 48-55% the last few days which is odd as we have had a lot of wet weather. I have removed around 15-20 leaves (total - only 2-4 removed from Amnesia) from both plants over the last week so perhaps that has helped with reducing the humidity a little as it usually sits around 60-65%. OG (in) = 5L pH 6.5 OG (out) = 1.25L (25%) pH 5.5 [1.0 drop] Amnesia (in) = 4L pH 6.5 Amnesia (out) = 1.5L (38%) pH 5.8 [0.7 drop] DAY 75 -------- Monday 16/11/2020 I mixed 5L of GWE updated schedule mid-bloom nutes for the OG and 4L of Sensi Garden peak flower nutes for the Amnesia. Both made with rainwater both pH'd to 6.4. I am feeling concerned about the runoff pH still not rising to 6.0 yet, perhaps I'm being impatient but it has been 16 days since I started giving strictly 6.5 (01/11/2020) and I know that the plants need the pH to vary within range in order to be able to uptake all available nutrients. Whilst the pH may be in range I believe certain nutrients cannot be absorbed at a pH of 6.5 and I want to get back to being comfortable feeding the plants between 5.8 and 6.2 (a reported "sweet spot" I've read from numerous sources online). As it has been over 2 weeks of strictly 6.5 I am going to try and slowly lower by 0.1 each feed and see how they respond. In any case, both plants look healthy and are growing and flowering and not showing any signs of issues. DAY 76 -------- Tuesday 17/11/2020 I gave the plants some pH'd rainwater. I intended to give them both water at 6.5 however I didn't have time and so the Amnesia water was pH'd to 6.4. I also did some more light defoliation removing 5-6 leaves from the OG and 2-3 leaves from the Amnesia, again just to allow more light to lower bud sites. The RH has been between 48-55% the last few days but is at 60% today. The plants both look healthy with no yellowing leaves or nute burn (perhaps the tiniest bits on the odd leaves of the amnesia). OG (in) = 5L pH 6.5 OG (out) = 1.15L (23%) pH 5.4 [1.1 drop] Amnesia (in) = 4L pH 6.4 Amnesia (out) = 1.55L (39%) pH 5.8 [0.6 drop] Looking at how slowly the Amnesia is growing over the last 2 weeks I really can't see me getting the 1.5-2oz yield I was hoping for come harvest.