Hard to see detail on the connection in question but the entire thing looks very similar to my Intex setup.
Okay, so I went out and grabbed some photos on my pool. Still had the return lines attached, removed them for the winter while I was out there. This is a detail shot of the connected hose.
On the inside of the pool there is a gray return piece. This is covered by another gray screw on grate during operation. In the middle of this is a “pipe” that sticks through the wall of the pool.
If I loosen the clamp and slide the hose off, it looks like this. You can see some gray sticking out the bottom, that’s the “pipe” connected to the gray piece inside the pool. The black is a rubber sleeve that is connected to the pool liner. The gray return pipe slides into the black rubber sleeve, then the hose is slid over this, and the clamp is tightened down. The rubber is flexible and creates the water tight seal when clamped.
Perhaps you can post an up close detail shot of your hose to pool connection and we can compare these.
You said something about not leaking at the clamp but at the pool. It shouldn’t be able to leak at the clamp, the clamp should fully be on the hose. Is it leaking at the end of the hose or at the joint to the pool itself?
For leaks, it’s often helpful to dry the entire thing off with a dry cloth, then watch for the water to start leaking out again to determine where exactly the leak is coming from.
