How big is the tank? If it is smaller than 100 gallons you could benefit by reducing the amount of light. And, if you get a drop checker and use it with 2-4 dKH distilled or DI water in it, instead of tank water, you can be sure that you have enough CO2 in the water. Without that you can only guess at the amount. Then, use the pH controller as a pH indicator only, not as a CO2 controller.

Also, if those test results are accurate, you need to increase both the NO3 and PO4 amounts to at least 10 and 1 ppm.