The problem is already solved so it thanks for your help I didn't dimmed the light the light is even higher now it was so ting with my nutrients I know now that the problem never the light is but nutrient inbalancePearling only means your plants produce oxygen faster than it can dissolve in water or the water is already saturated with oxygen. It tells you nothing about health. So when a plant comes all kind of nutrients short, it still pearls, but basically it's only dying faster than when it wasn't pearling. So all the pearling tells me is that you use a lot of light, all the gda tells you it's more light than the plants can handle with the amount of nutrients they have.
My advice would be to either reduce the amount of light or find out what your plants are missing. 9 out of 10 times I fixed GDA by adding magnesium, but it might be something else in your tank, or you can try magnesium as well.