If it were me, I would just try to water with regular PH water for now during next few waterings. Also, the plant does look stressed by something else possibly (light distance or wind burn). Just giving my best guess! Wish you the best of luck
Hi there! Im not 100% sure but your plant looks like it has nitrogen toxicity. (clawing of fan leaves) I do know that its normal to have more yellowing on new growth in early flower