I have an inground pool with 2 ladders currently and no steps. I'm having the liner replaced this spring and intend to add steps inside the pool as I do not have the room to make a cutout extending out of the current 16x32 shape. I'm planning on adding them in the corner of the shallow end and was wondering what is required for steps height and tread depth. I want to minimize the number of steps so it takes up less room in the pool. I have read that 10" is the max height and 12" is the minimum tread depth. Also, is there any requirement on how long the shortest step needs to be? Being in the corner of the pool the top step is going to be shorter and if it has a minimum size that will dictate the size of the rest of the steps. Thanks in advance.