My first vertical conversion attempt

[Sunshine]

I was just worried about ventilation. I wasn't sure if they would be getting enough fresh air since the tank is so tall.

[deranged chipmunk]

well, a second vent definitely will not hurt. it will definitely help air flow you are probably better off having it than not. put it in, you could always cover it later if you find it isn't needed.

[Sunshine]

Good idea! Thank you once again!