Hey Deku, sorry I didn't see this post earlier. Yes, a 67 gallon tank should be enough space for two, and there are several people who have CB Colorado river toads at this time. Here's a couple articles: http://www.reptilesmagazine.com/Natu...do-River-Toad/ http://www.frogforum.net/content.php...n-and-Breeding http://www.faunaclassifieds.com/foru...d.php?t=566146 http://www.faunaclassifieds.com/foru...d.php?t=566759 http://www.faunaclassifieds.com/foru...d.php?t=564201 http://www.faunaclassifieds.com/foru...d.php?t=537756