without co2, that's pretty much irrelevant. your stock levels were going to help me base how you dosed no3 until i found out your mix was already mixed.
for clarification... not because of any fear of over dosing... just so you didn't waste it when you probably don't need the extra.
put it in a shallow tank and let it reach the surface to make use of atmospheric (unlimited) co2. when you have an abundance of it, distribute the extras where you really want it. that 55 is going to be your toughest tank on plants for several reasons including, but not limited to surface area to volume and the struggle to provide enough light to the bottom without overpowering the tank and creating an algae farm.
look that bulb up on line... get the specs on the color there. there's obviously a misprint on the package. 1k isn't even possible... that would be black, which is the opposite of any light at all.
