For hatchlings the care sheets I gave you links for don't address how often to soak the baby tortoise. A constant source of clean water in a very shallow dish is very important. I find hatchlings are in and out of the water all day. The water needs to be shallow enough that the hatchling can easily breathe while sitting in the water. The water should go up to no more than one third the height of the tortoise's shell. (For a newborn, about a quarter of an inch is usually enough.) the dish will need to be sanitized daily. I use ceramic dishes that the tortoise can climb in and out of. I usually get really small ones from Crate & Barrel, as they are usually a lot cheaper than pet store dishes. I wash them in the dishwasher on the heated drying cycle which will sanitize it. You can also use a bleach and water mixture – just soak the dish for 20 minutes or so, then rinse really well with water. You can also use a plastic lid from a food container to soak her in (this way it will be made of food grade plastic so is safer). It can be hard to find a dish tiny enough for such a little newborn.
While there may be differences of opinion about how warm the warm end of the plastic bin or terrarium should be, it is important that they don't get overheated. Over 95°F for too long can cause brain damage. I have usually made the warm area 85°F to 90°F. This has worked quite well.
It's great that you already have box turtle experience. I got box turtles first, and it helped me in understanding how to pick up on my tortoise's expressions. And I have to say, Tiddles is really, really cute!
While there may be differences of opinion about how warm the warm end of the plastic bin or terrarium should be, it is important that they don't get overheated. Over 95°F for too long can cause brain damage. I have usually made the warm area 85°F to 90°F. This has worked quite well.
It's great that you already have box turtle experience. I got box turtles first, and it helped me in understanding how to pick up on my tortoise's expressions. And I have to say, Tiddles is really, really cute!