keeping fbt is easy and you really need a tank thats half water and half land.... the best way i have found is taking a tank divider and cutting it to the height that you want the mulch and water to be and placing it in the middle and half mulch and water.............. making it easy for them to get in water or land with a lamp an hide out and water with a few big rocks in the bottom and mabe a floating dock. . . . . thats the set up i had and they were happy but i also had places to climb but thats mostly a basic set up