Yep! Red Eared Sliders. Males get 6-8 inches and females get 8-10 inches. For both of them I would do a 55g tank for now, and a 125g tank in the future. They are very messy and need a filter rated 4x the aquarium size. Make sure they have a basking area big enough for both at the same time, a UV lamp, and a heat lamp! The water does not need a heater though. Water only needs to be above 68 for them to thrive.