Made a quick test level and I can vouch for this. What should be a very straightforward level becomes a puzzle purely because of Slider>Swimmer physics. To be fair, this isn't necessarily a problem.
The first pool has a high wall, so the Slider doesn't jump out, but instead turns against the wall and carries on swimming. The 2nd and 3rd pools, not so much.
Also - not sure if this is a bug: the drop into the 2nd pool was originally lined up to be pixel-perfect, but the lem landed directly onto the steel block rather than in the water, suggesting that the Slider falls 1px forward from the bottom edge of the wall. Again - not sure if this is a bug, but it wasn't what I was expecting. I had to move the pool structure to the left by 1px so that the lem would drop into the water.
The Slider is a great skill, and is definitely worth ironing these kinks out so that we can keep it!
EDIT: The previously attached version of this level was impossible in order to illustrate the point. This new version, with 2 Jumpers, now makes it solvable.