There are several possibilities including the northern cricket frog (tree frogs:
Hylidae) but many tree frogs have wartier skins. Could also be juveniles of several true frogs (
Ranidae) : gopher frog, leopard frog, carpenter frog. Juveniles are smaller than adults. However, true frogs tend to be more aquatic than tree frogs. Your photos aren't the best so I can't tell for sure which it might be. If the frogs don't have a very noticeable "ear" (a disc behind the eye) that can help distinguish which species it is. Can't quite tell from your photos. This might help rule out what they
aren't:
https://www.floridamuseum.ufl.edu/di...s/frogs-toads/
Amphibians live near and are attracted to bodies of water because of their life cycle. Their permeable skins make them much more dependent on having easy access to water. They live much of their lives near ponds, lakes, marshes, even very temporary seasonal pools. Swimming pools are bodies of water and they've actually ended up replacing what natural wetlands used to be where your house is. It isn't that the frogs are overly
attracted to swimming pools per se, but the higher level of humidity in the air immediately over and surrounding a swimming pool may be attracting them to it. Of course, the chemicals can be lethal, again due to that permeable skin.
Do you find more of these frogs in your pool during or after rainy storms? Just as you tend to hear frogs sing during rainy storms...they're displaying to potential mates. Many amphibians tend to more toward water bodies during storms. The drop in barometric pressure due to an approaching storm is a sort of early warning signal that wet weather (the best time to congregate in a pool to breed, produce and fertilize their eggs) is on the way.