Can anyone help me identify what is happening with my plants? Can anyone help me with why my leaves are browning?

My parameters for my tank are all in a very good spot. Ammonia 0, Nitrates and Nitrites in a good spot, PH 7.2 currently. Temp at a consistent 78 degrees F . I know it doesn’t need to be said, but I don’t run C02 into the tank. Just dosing fertilizers.

I’ve been trying to get into live plants more in the last year and I’m really enjoying watching them grow. I’ve upgraded to a Fluval 3.0 light, running in 2 seperate durations for 7-8hr total. All the light settings are in the last picture.

I use the recommended dose of Seachem Flourish on Sundays only.

I used recommended dose of Flourish Excel once every other day, sometimes every 3 days.

I’ve been using root tabs under all plants with a new one every month. I replace every 2 weeks for the two big plants I have.

Setup is around 3-4 years old. Been going for more live plants in the last year.

I know that big plants on the driftwood should be in the substrate, but I didn’t know at first and its roots have made their way throught the driftwood now and I’m afraid it’ll kill it to pull them out.

Any and all help will be greatly appreciated!