Hi! I recently got this Albo Monstera. I have it for a month. It was rooted in moss and I repotted it with equal parts of perlite, coco husk, Charcoal, orchid bark and potting soil. I also treated it with neem oil. It's in my sunroom with bright indirect light: temp around 60-70 degree F. I water it once a week or whenever 2 inches below the potting mix are dry. Since then it's growing new roots. I noticed the leaf has black in the veins (Looks like it sucked in black dye). It's getting bigger and its been one week since it started. It's on the newer leaf. Is this normal? I'm new to this plant. Thanks I appreciate your help.