three-fingers
Fish Connoisseur
Emm...no they dont? They only have 2 x 54W T5's, unless the link has changed.Pressurised CO2 is a must with these tanks...they hold 450 litres and have 4*54 watts of HOT5's thats a lot!
I cant think of any off-the-shelf tank that has so much lighting you need to buy a CO2 unit.
And remember, there are easy ways of getting round a CO2 unit! Floating plants work great if you feel you have too much lighting...
The lighting on that tank is fine for low-medium light plants, and with CO2 you could grow more demanding plants too, but you don't need CO2 .