Posted: Sun Oct 14, 2012 5:49 pm Re: Safe to get a new turtle mate?
Although turtles are relatively solitary animals, they are not hermits. Even in their natural wild habitat turtles socially interact with each other. Your turtle interacted with a turtle companion for 6 years, so it's not surprising that she misses that companion and interaction. While it's all well and good to say turtles are perfectly fine being alone, your turtle has never been alone until now and that is a BIG change in her life. If she had lived alone since you purchased her as a hatchling it would be different. YOU would have been her sole companion and interaction. But that's not the case.
Older turtles are more difficult to cohabit with a new stranger of any age/size. It's not impossible, but would require a serious commitment of time and energy on your part supervising the initial introduction and subsequent time together. You couldn't just throw a second turtle into the tank and expect anything other than a dead or injured turtle, or two. Likely, your best chance of success would be to house the second turtle in it's own tank then set up a third "day tank" where the two turtles could be together under constant supervision, starting out for very short periods of time and slowly increasing the time together as the aggression subsided. There's no guarantee this would work either.
You might have better success cheering up your turtle by introducing a couple of fish big enough not to be eaten easily. Gold fish get pretty big but I have no idea where you could purchase larger ones as I've only ever seen the small ones for sale. Your turtle would eat small ones. This might mean you'd have to get a bigger tank but the fish would provide stimulation for the turtle.
Hope this helps.