Posted: Sun Jan 25, 2009 7:19 pm
You need to separate them asap. They have realized that there is a lack of resources and have turned on one another to free up some resources. Once aggression starts, it rarely goes away. If given better circumstances (a tank that is at least 10 gallons per inch for both turtles, I'm guessing at this point around 100 gallons?), the aggression may go away. But if you cannot afford more than 30 gallons, there is virtually no chance it will stop. If you don't separate them now (like literally at this moment), you may be dealing with a severe injury or death soon.
Go to Walmart and purchase a large rubbermaid container, they are inexpensive. You can put one in there for the time being. You'll need at least another water heater, but you may be able to alternate the basking light and UVB bulb for a few weeks (try to give each one about 6-8 hours per day, you may just need to switch turtles in your main tank.
You need to start either finding a new home for one of them or setting up an additional habitat or get a larger tank. Check out Craigslist for used tanks.
JAX
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Baby Boy - January 9th, 2011! (3 months old)
1 RES - 7" long - Umi (3.5 years old)
1 black lab/hound mix - Josie (1.5 year old)
2 cats - Mysti and Molly (6.5 years old)