Hi mate,
As I can see your pictures, your tank is not enough mature to handle so much light !! reduce it.
Also you could add some fast growing plants to speed up a bit the whole process. try some hygrophilia they are cheap and fast growers.
but you really need to let your tank mature before nuking it with that much light. You never know how much time it gets to be mature. My last scape it took 4 months as a started from scratch (new sand, new filter etc...)
hope it will work for you mate cheers