How long are your lights on for?
Looking over your historic posts you seem to have a well established tank. The photo of the PH just looks like what i would expect a piece of equipment located at the top near the lighting to look in a seasoned tank. A bit of manual cleaning, maybe bleach treatment would clean that up.
The leaves generally look free of algae except for the plant with small leafs that im assuming your pleco cant access to eat the algae. Again some careful manual cleaning with a toothbrush should take it off.