Hi. Just got a new pool finished and have been enjoying it and this website for about a week now. It's a custom L shaped vinyl inground. 3 ft shallow to 5 ft deep. It's not for diving but a real fun play pool for the family. So far the water is great. Crystal clear and holding. I'm only running around 1-2 FC, but with my low CYA levels of about 15 right now it's doing the job and I'm being patient letting the trichlor gradually do its own stabilizing. Thanks for the great resource!