You can dose once a week perhaps 2x a week and dose the excel more.
1/4 teaspoon of KNO3 2x a week
1/16" teaspoon PO4 2x a week
10mls traces 2x a week
Add 28mls of Excel, everyother day.(you need more than the directions suggest)
50% weekly water change.
Pack the tank with plants, do not ever wait for the plants to grow in a new set up.
This is more likely why things did not go well, it's not the NO3, K+ nor PO4 levels, they can be all over the place, as long as they are not too low, things should be fine there.
The main things that causes algae in new set ups using EI:
1. Not enough plant biomass (not enough plant biomass to remove the NH4 from fish waste, once the tank settles in more, the bacteria asnd plants keep this cation immesurablely low)
2. Poor CO2 or carbon enrichment
NH4 is a great way to induce algae.
So add more weeds, let the other plants grow in and afterwards phase out the weeds slowly.
You'll need to remove the algae that's there now.
Clean the tank good, stir up any left over muck, trim the plants, then do the water change.
Add more Excel, light for only 10 hours a day, dose the above.