Salamanders get in your pool because they like water. Has it rained before they get in? That's how it works at our house. Just scoop 'em, 'cause animal control will laugh at you! They do no harm, but if you leave them in they will add a ton of contaminants which will require work on your part to eliminate (ie lots and lots of chlorine). It doesn't matter what the water chemistry is, they'll get in - they just won't last long.