You mentioned your plants were not looking good. I had a green water outbreak last year that just wouldn't go away. Large water changes everyday did not help. Then I noticed that my grass plant was looking ragged. I removed it (left all the java fern) and voila my tank cleared right up with some more water changes. the "leaves" on the grass plant were trapping excess food particles and they were dying off. This lead to a boost of food for the algae to use and it took off from there.
So if I were you I would trim off any dead or dying plant material and see how that help. Your plants will have to be healthy for them to outcompete the algae otherwise the algae will just use the food to its advantage.
So if I were you I would trim off any dead or dying plant material and see how that help. Your plants will have to be healthy for them to outcompete the algae otherwise the algae will just use the food to its advantage.