ELCD frame

[nole16k]

do you still have to have Co2 or nitrogen if you have a boo-yaah electronic frame????

[Dermen]

It will work with either. If you use co2 I would suggest getting anti-siphon. And if you dont have a reg you should get one of those first.

[sven van poppel]

piranhas work fine with co2 and you do not necessarily need a regulator. the only time my elcd fish ever froze was in the winter.
you'll be fine with co2