What Lighting do I need?

[bec23]

Hi,
I have a standard 2ft tank.When I bought the tank the light in the package was one of those ones you fit a bracket to the top of the hood, push the ends over the light tube, and mount in the bracket. I beleive it is only 20 watts.
Im looking to upgrade my lighting to house some crypts and another few plants which I cant recall the name of. Ill update later. Im looking at buying a nutrafin CO2 plant nutrient system also. Any advise would be appreciated. As far as fish go, I have a pair of Kribs and 6 of their babies.

 

[Lateral Line]

CO2 is only really necessary in high light conditions, with fast growing plants. The majority of Crypts are forrest dwelling and so in nature have only limited light, they are not fast growers and will tolerate low-medium light. 20Watts is not much, you'd be better off spending the money you were going to use on the CO2 uprating your lights.