Mario they definetely can. I about 6 inches of sand in my 10 gallon and 5 or 6 inches of water. I also have a basking rock set up for my two hatchlings and they typically bask 2 or 3 hours a day. I have included a couple of live plants bought at PetsMart for cover. They seem to like the set-up for now, although a 10 gallon is not a permanent home for any softshell. You would need at least a 29 gallon or larger for a male smooth or spiny in my opinion at some point. The ten should be fine for 6 months to a year, maybe more. Just make sure you change the water once every week or two and have a good filter. I have a whisper 10-20 gallon on my tank and it works great. I only change the water about every week and mine do great. What kind of hatchling do you have anyways?