Does my turtle have RI ? PLEASE HELP

Question
I have a baby 3 stripped muck turtle. She was living in a 50 gallon tank with a red ear slider and a yellow belly. She was found on the side walk about a year ago; I feed her once in the morning and once at night, she ate fine this morning (3 shrimps and 3 pellets. Shes about an 1 inch 1/2, water is giving from the faucet, I don't have a heater in the tank, I have moved her back in to a 10 gallon tank by herself so I can monitor her, and there has not been any shedding. When I first had her in the 10 gallon tank she would always swim at the bottom, and rarely bask on the dock, but after I moved her to the 50 gallon tank with her tank mates witch was a week ago she NEVER swam all the way down and she is was on the dock 90% of the time witch I found really weird, I started to get worried because she barely swims around now, and if she does shes on the surface of the water. She also floats now, and i don't know why. Please help! :( I don't want my turtle to die. could she have RI? or could it be something else? If so what should I do?

Answer
Most of you posing me questions don't seem to be getting the message. I have a specific set of instructions that are to be followed when submitting these sort of veterinary questions to me, and if you aren't willing to provide the background that I ask for, then do not ask me the question. I don't know how much more clear I can make it.

Most of the time, I would just reject your question right off for not following those directions. You are asking about diagnosis and treatment of illnesses via internet, where I can't see the patient, and which would normally require you to see a veterinarian to get the level of help I provide. I get bashed often enough by the veterinary industry for even doing this online. The least you can do is follow my instructions if you want that kind of help. I'm going to actually extend a little extra courtesy this time, and rather than reject this question, I will give you an opportunity to follow up with the information asked for in the instructions. It will be completely up to you to go back to find that, and then provide me with those required details. If that's too much trouble for you, then my advice is to see a veterinarian. I will not play guessing games because of an incomplete patient and husbandry history.

Sincerely