Eel's 1st indoor grow- Meph White Crack

Week 5 Summary: There are TWO double buds growing on WC#1, both coming from the same node from the main stem. Cool! I know it's probably not good for yield but it's cool none the less :D Days 29-32: I normally watered every 2 days but I noticed the girls were getting thirstier and alot faster. Had to up my watering volume to 15%(1.5l) pot volume once with a Calmg+Ph water, as it says on the bottle of the Calmg I shouldn't mix it with K boosters, So I'm doing a Calmg only Ph'd watering and then a bloom nutes feed at 1/4 strength so far.(biocanna bloom nutes still contain enough nitrogen and so does the Calmg). Last feeding on day 30 was with 2l. Hoped they would stay happy longer. They did but not as long as I'd hoped lol. Day 33-35: I was actually going to wait one more day to feed them after feeding them the most they have gotten yet(volume wise), but 3 days later they actually unexpectedly showed signs of underwatering so I had to feed em on the 24th...(day 33). Gave em another 2l. Noticed signs of deficiencies today. Plants were showings signs of underwatering, and temps were at 28 celsius and 45% RH. Heat stress? But the leaves affacted(see pictures) were toward the bottom and some were actually not that old on the white crack. Oh well, will add Calmg next feed. Fast forward to day 35 and the pots are already feeling light again, so I finally decide to water till I get a significant amount of runoff(hard to judge with these air pots cuz they sometimes leak out the sides). Gave em all a nice kind of flush(only Calmg) of with 3l each. Going to stay at 3l from now on, seems to be the right amount of runoff. Soil is a bit acidic atm judging by the runoff PH(strange as it was really alkeline last time). Not really sure what to do with the soil runoff PH lol. Also I have been defoliating every time I water them as well. I think I'll start to go easy on them now after doing what I did to them last night lol. But checked today(day 36) and they are doing great, already starting to recover, even saw a slight increase in height from last night(like 1cm). Since this is my first grow I'm not really sure if they are on track but comparing it to other grows of the same strain I seem to be doing ok :D