Banana Melt (fem) - Humboldt Seed Co

probably fluctuating pH -- this causes varying growth rates in the leaves, so you get waves/warping etc. the paling of the top leaves are mostly likely something else, but i'd ensure pH is relatively stble (within +/- .2 is probably good goal, and ok to do better than that too). Once thta's stable for a bit, and you can observe new growth after that point -- if it looks fine it was probably related to the pH .. if it continues to reference a leaf chart and make your best guess like anyone else... at the least, paling from in to out on leave is one of the more distinctive symptoms.

Yes it's the PH, you can tell because the whole plant is changing to a light green shade. Also check that the RH is good.

She’s still pretty. Don’t cut her hair off! She’s just in her awkward phase. Nah, but seriously, why defoliate her. She needs those leaves to grow. Just get her ph together and let those leaves do some work