Alrighty, cool : ) and love the pic : D
Not sure about water hardness, only did that when I first started my tank, but the PH is about 7.4
All I found was a Fluval CO2 kit, rated for up to 40gallon (said 88 grams or something) and it was almost a hundred dollars. Can't really afford it with the cost the bigger tank is going to be.
* 7 Green Tiger Barbs