funny that you mention co2 jimmy. the 75 is going to have a pressurized co2 setup. i REALLY want to set up an amano inspired tank and the 75 is going to be it.
the 60g is running diy co2. it has (5) 2 litre bottles connected to (2) 20oz gatorade bottles used as bubble counters and then they feed into the 2 powerheads. i am still playing with formulas, but right now i get about 3 weeks from my bottles.