More plants, got it!More plants! More plants!!! Floating and marginal plants to combat algae.
They can use more sunlight and thusly more nitrogen and phosphorus than plants conducting photosynthesis in the water column due to better access to CO2 and the plants on the surface help shade the rest of it. In addition to these benefits they’ll help get your fish less skittish
keep it up- don’t start throwing chemicals or barley straw at it- get it balanced out, way worth the challenge and effort. Have fun!