Welcome to the forum BTW

Thats a hell of alot of light you got there... the main problem I see is that, if your readings are accurate, which through the tests we have available, they cant be, the CO2 you have in your tank is going to be limiting.

Id drop your lighting to half, introduce more CO2.. and see how you go from there.

if your dosing with EI, and your still having algae issues as bad as you are, then your biggest problem is CO2. Use a drop checker to assess how much CO2 you have in your tank, tests are more or less useless.

The high light you have is going to try to drive the plants to take up huge CO2, which just isnt there.. this is going to lead to stunted and deformed growth. The more you read Tom's posts, the quicker youll realise this. Light drives CO2 takeup, CO2 leads to nutrient takeup. If your dosing EI, it cant be the nutrient, you have a boat load of light, so it must be CO2.

Dropping your light intensity will lessen the plants need for CO2, creating a much more stable growing environment.