I dont know who is giving You advice but there is some spread there.
If I am correct You are a beginner. Than you should act as if You and the tank is new.
I recommend you You good testkits because You need to know what´s happening.
Then I recommend 0,05 to 0,1 in phosphourus and 5 to 10 in nitrate. That should hopefully garantee a sound green algae growth.
They will be stronger than the cyano and the dinos? To take care of those algae snails and hermits are good as well as many blennies. You need a clean up crew.
The cyano just loves carbon sources so stop that. Clean the windows and make watercanges sucking the rests out.
There is some videos about starting tanks some are good others not. I recommend You to check the the BRS videos.
Choose a methode and stick to it. Combining elements from different methods seldom works.
After the starting time is over and the tank begins to stabilize use the Kiss (keep it stupid simple) method for at least half a year.
Then You can choose how to take care of the tank.
(The corals I see in Your tank handels 0,3 in phosphate without problem)