Dosing: I really have no idea if this is the correct amount for my tank. I did a calculator on some site but I don't know if I followed the directions correctly. I also put in 5 Seachem root tabs.
Nitrogen: 10/16 tsp
Phosphorus: 2 3/4 tsp
Potassium: 7/16 tsp
Well, tsp amounts really dont tell us much without knowing what it translates to in ppms. But I assume you're just following the label directions? That should be fine for your set up.
However, plants need mico nutrients and Fe, along with macros. Currently you're only dosing macros, and some Ca and Mg in the Equilibrium.
If you're going to stick with the Seachem liquid routine, you need to include Flourish Comprehensive as well. It provides the Fe and other micros.
You could also go with Flourish Trace for micros, but it doesnt have any Fe so you'd need to buy their iron as well.
Speaking of Equilibrium, that's a general hardness (GH) booster. If your water is pretty hard like you mentioned, then you probably dont need that.
As far as light and what Dempsy said, it might be an issue with some of those plants, the bacopa and chain sword, pennywort maybe.
But if the hood is brand new with a nice white reflector, it should be enough to keep most low light plants healthy. They just wont grow very fast.