The problem with plants is the same symptoms can indicate opposing causes. Too much light? Leaves yellow. Too little light? Leaves yellow. Confusing, is it not?
Are the Java Fern and Anubias planted in the substrate; i.e., the rhizome where the leaves originate are buried? I have a friend who owns a plant business in Florida (used to be in Alabama) who clones Anubias. He said it is extremely important that they be in low light; that they are basically shade plants which is why they do so well with Betta.
As Rainbo suggested, I would float some stem plants like Anacharis or Hornwort to help get rid of the algae. This would also create shade and reduce the impact of bright light on low-light plants. Which brings me to say length of time a light is on is different from brightness. Even low-light plants need eight hours of light but they don't need the bright
light. Do not plant; instead, weight them in a corner to flow over the surface. Until you get them, I would place some paper over the canopy to dim the light. DO NOT GET DUCKWEED!!! You will thank me for that bit of information.
Old Dog 59 is spot-on that minimal algae can be the sign of a healthy tank; however, I would add that when algae starts to take over and grow on substrate, walls, etc., there is a nutrient/light imbalance. In your case, I agree with both of the above and believe the light is too bright and the nutrients too many. As suggested, stop with the liguid ferts for a bit. If you can, try to remove the plant tabs but substrate ferts don't really impact the water column that much.
Add the floating plants, stop the water column ferts, make sure the Java Fern and Anubias are not planted, get a timer so lights come on for eight hours per day. To suit my schedule, mine are on from 4:00 pm to midnight.
I don't think we've forgotten anything.