West Coast OG x3

Day 36 week 6 I've gave them 2.5 ml micro , grow , bloom and 2ml of b-52 to 4 litres of water the leafs are still a lime green yelllowish colour but all 3 are still doing good plants 1 and 2 are fully in flower but not seen much growth in the last week plant 3 is still stretching. Day 38 quick update plant 3 as got bigger than plant 1 and doesn't seem to be slowing down. I've not seen any new growth or any of the bud sites getting bigger which I'm worried about also plant 1 does seem to be getting bigger just very slowly. The leafs are still a lime green / yellowish colour but there still growing. I also raised plant 3 and 1s light because of plant 3 getting so big. Day 39 plant 3 is still getting taller but I've noticed little brown spots on the leafs I've done a bit of research the only 2 things I can come up with is manganese deficiency which my pH is to high or cal/mag deficiency ive added cal/mag but I really think it's the first problem. I've also trimmed some more leafs from the bottom of the plants and I gave them 3 litres of water with 3ml cal/mag , big bud , bud candy plus 2ml B-52 and rhino skin. Day 42 last day of week 6 the leafs are still lime green yelllowish colour but there still growing ok and plant 1s buds are getting bigger there starting to get trichomes same as plant 2. Plant 3 is 85 cm now I think she's slowing down on the streaching I can see the buds starting to form alot better. I've gave them 4 litres of water with 4ml big bud , bud candy then 3ml of cal/mag , rhino skin and 2ml of B-52