That tank has very high light intensity with that light. So you need to be sure you are supplying non-limiting nutrients and very good CO2, consistent from day to day, with good water circulation, and some water surface ripple. That might keep you from experiencing algae problems. But, the best thing you can do is raise the light to about 24 inches from the substrate, to lower the intensity considerably. And, you don't mention phosphates in your dosing - the plants will not grow at all well without phosphates.