
Actually im planning to set up a slightly brackish environment for a figure 8 puffer fish. Im planning on planting my tank with;
java moss
java fern
vallisneria spiralis
green hygro
and anubias barteri nana
After researching for couple of days

I found out that thoses plants should all do well in "slightly" brackish water and low light condition (i have 28 watts for 20g)...
My tank is a high 20g ... 20 X 10 X 22.
I really love plants in general (my apt is full of them

) and it is really important to me that the plants im going to put in my tank are full and healthy and that is the reason why I was wondering about getting a Co2 diffuser.
I know that figure 8 puffer and the plants I choses could do well in a Ph between 6 to 8 so I don t need such a high ph.
My water has a density of 1.008.
So what do you think should i go for the co2??