Chameleon whiptails

[Healingeagle]

Hello!
I'm new to the forum, first post. I'm about 2 weeks away from my first chameleon whiptails. I would like to connect with someone who has successfully raised these fish. I'm getting 5 wild caught 8"-10" hard to tell as they were burying themselves! Very cool fish. My first most pressing question is tank space. Is a 120 gallon 4' x 2' x 2' going to be big enough to do these fish justice? My other option is a 125 gallon 6' x 18" x 24" but I do not want to repair or move that tank if possible. Any opinions? Thanks