A newer tank just getting through its cycle is a touchy time with algae. Two things you could try to keep the "devil" at bay is shorten your light period to six hours. Second may be from low carbon source. A condition algae loves with long lighting periods. Even with using pressurized CO2, I have found that continuing to dose some glut (Excel or Metricide 14) liquid carbon helps control algae as well as give some carbon for the plants to use.
Lucky indeed is the person who starts a new tank and does not have algae problems. I know mine sure did. If you want to use liquid ferts, look to get the full Seachem types so you'll have the macros(N, K, & P) and the micros(Flourish). Look at dry ferts like Green Leaf Aquararium's PPS-Pro or EI. Much cheaper, especially when dosing large tanks. If algae continues, take some pictures and post and we all will try and help you more specifically. Good luck and welcome to the planted side. OS.