Optimal temperature for O. bimac??

[wombat2]

The nonheated tank I have in my bedroom right now is at about 60-62 F, and in the summer it was about 70 F. My question is should I buy a heater??? The temp doesn't swing much between night and day. What's the best temp for these guys??

 

[cephalopoder]

Thats a great temp for O.bimaculoides. It is too cool for tropical species. If you notice the temp fluxuating during the day much you can steady it with a heater. I think the nrcc breeds theirs at 64F.