A hex tank is harder then the normal type of tank to light, so you are most likely not going to get as much light into the tank as others would with the same lighting.
If you stock your tank full of plants, I doubt you will need CO2
. Let algae and plant growth be your guide. Though, adding CO2
/Carbon to any tank will help with plant growth.
is the preferred method of adding CO2
. You can do the DIY style, but ensure you are using atleast 3 bottles with that tank size and alternate which one gets changed out. That way you are maintaining a more steady CO2