I've just transformed my 29 gal tank into a planted tank. Added CO2,
lights to make 2 wpg, but I didn't change the substrate. I have just
plain aquarium gravel right now. Will this do OK? I'm assuming there
are plenty of differing opinions, but any suggestions would be helpful.
And can I do anything without emptying the tank?

Thanks in advance for any suggestions.

Tank: 29 gal, moderately planted, 2wpg