We have a little pool like that. Daisy is the only one who goes in, and she'll step in and stand there for a couple minutes, then get out. I think she really wants to get in the big pool with me! You'll see her stand up on her back legs an look over the edge at you, like she wants to get in but doesn't quite trust herself. Gunnar limits himself to hopping up on the deck around the pool and laying there playing lifeguard.
The hose is another matter. I can't even water the garden without Gunnar going ballistic. I have to put him in a down/stay and water the plants, otherwise he's attacking the water. Daisy will stand there and bite at it, but if you turn the hose on her she runs! She's also taken to grabbing the hose as you pull it across the yard but I've been discouraging that, I don't need holes punctured all over the place. Hmmm- one of those soaker hoses for the garden!