Hello Mas...
First, if you have a new tank, then the water chemistry takes time to set up. You have a small cube with water, plants and hopefully fish and all those things need time to adjust to one another. It's just like in nature. The waters and fish and plants have taken a long time to become stable. No problem.
Algae isn't a bad thing, it grows in most healthy tanks. It thrives in water with a lot of nutrients in it, especially phosphates. Phosphates are in most of the fish and plant food you buy.
Right now, I'd just get an algae scrapper and remove the stuff from the front of the tank, so you can see the fish. You can get a few "Ramshorn" snails. They love all kinds of algae and will remove it pretty quickly. You can ease off the amount you fertilize and feed your fish for a couple of weeks and see how the algae is affected.
There are a number of other things you can do, but just be patient and let the tank work for a while.
B