Nothing a strong one...
A 5 inch sized turtle is too big for a gallon sized tank. They need more room to swim and the filtration needs more water than that for a turtle that size. I have a 5 inch male red eared slider in a 29 gallon aquarium and I consider that to be the smallest tank I would recommend.
ALL fish need filtration.
You can if the tank is very small. Most turtle owners opt for larger tanks, and they add filtration systems. This minimizes water changes.
no it does not
Try to get it, 3 times bigger than your turtle. I have a not so little red eared turtle and i keep it in a large tank.
It depends what kind of turtle it is.Some turtles do not need water and can be kept in a room,or big area.
You need somethink like a hampster tank With Big Rocks and Water in a container the turtle can suck on also need turtle food im not sure where you can get it but try Rite Aid
You only need one that your turtle can swim in and if you get one to big it is okay they adapt to there inviorment
most pet store sell turtles fairly cheap, although this is not a cheap pet to own, they require a source of uv, an aquarium, a heat lamp, water filters, and other things. you are looking at a very basic enclosure to last about a year running about $100-$150, as I said this will only last for about a year then the turtle will out grow the inviroment and need a bigger tank. also if you plan to get a turtle, the filtration needs to be at least 3 times that of the tank, so if you have a 30 gallon tank you need a 90 gallon filter, or 50 gallon tank 150 gallon filter. they are very messy eater's and poop alot, so it's very hard to keep the water clean without proper filtration. while most pet stores sell turles for $5 to $15 that is the smallest of the expenses.
A Mississippi Mud Turtle is a Semi-Aquatic turtle and as such, it will breathe not only from it's mouth, but needs to have adequate filtration in its tank so that way it can breathe subcutaneously, that is, through their skin (like a frog does) when it is sleeping in the water at night. But mostly, it breathes through its mouth.
around 80 degrees.
24-28 C