Yes they are, seeing the bottom of a dark bottomed pool is not difficult at all contrary to the opinions of some
No
hydrocarbon acid
Yes
Under no condition do fiberglass pools have "ripples" on the bottom after they are installed. Of course, the pool could have been damaged in some way, then improperly repaired, before or after it was installed.
The water sinks and pools at the bottom of the tank
there is more grip with bare feet.
they are safe from preators & laze around on rocks
deep enough for no one to be able to touch the bottom
The Benthic Zone.
Moon pools are openings in the bottom of offshore structures that allow for the passage of equipment, personnel, and water. They help to maintain stability and safety during operations by providing a way for waves and currents to pass through the structure without causing damage. The main purpose of moon pools in offshore structures is to facilitate safe and efficient access to the ocean below for various activities such as drilling, construction, and maintenance.
No sanitizer? Not safe! Especially for females.
At the bottom of a waterfall, you may find a plunge pool. This pool is formed due to the force of the falling water excavating the soft rock beneath. Plunge pools can vary in depth and size depending on the waterfall's height and flow rate.