Question for chatony. What is the pH of your water? When plants turn yellow, pH is one of the things to look at.
Question for people who have raised aquarium plants. Does driftwood provide iron? Iron loss is another thing to look at.
sirdarksol-driftwood does not add iron. Very few aquatic plants are influenced by the ph of the water. anubias is not a heavy feeder so I don't think iron deprivation is a problem.
Chatony- how long have you had it?