First lil' grow

Its day 50 and the buds on the Strawberry Banana are fattening up nicely while the buds on the Haze Berry are also starting to flourish. Orange pistils are appearing on the Strawberry Banana and the leaves closest to the budsites are taking on a frosty hue. The SB-Auto is 68cm tall while the HB-Auto is 75cm. There are quite a few leaves on the Haze Berry showing signs of stress/damage/nutrient deficiency. I should be paying closer attention to whether it's also new leaves showing these signs or just the same ones from before I amended the soil with BioBizz CalMag. The person working at my local grow shop had a look at some pics and asked if I'm using LED's and said she thought it was likely symptomatic of a CalMag deficiency so I have since fed them twice in the last week w/ a BioBizz CalMag solution at a ratio of 1ml to 1L of distilled water (each plant receiving 500ml). I also checked the pH-level of the soil with one of those cheap yellow box testing kits, the accuracy of which I'm skeptical of, but it showed a deeper blue colour that could indicate the pH-level of the soil had moved closer towards 7, which worried me. Due to work I didn't have time to visit the store, so I diluted 3.5ml distilled white vinegar in 1L of distilled water, which my cowboy maths suggests should result in around a 6.3 pH-level watering solution. I've done this the last two waterings, so I'm hoping this will have a beneficial effect on lowering the soil pH-level. Next investment will definitely be a decent quality pH-testing pen! I was worried for a hot minute that my SB was a hermaphrodite because I confused the calyxes for male reproductive parts 😅