I start my Droserae seed in clear plastic cups. I use 2: the first has holes drilled (or melted) in the bottom. Water is placed in the undrilled cup, the cup with holes gets a 50/50 mix peat/sand to the rim, and sits inside the cup with the water. I aim at a moist but not soggy substrate. This whole unit is then placed inside a zip lock bag after being labeled, and is placed in a warm low light area. I check weekly for germination. After all the seed is germinated, I gradually harden off the seedlings by cracking the bag for longer and longer periods, eventually doing away with it. The cups then sit in tray watering, under twin 40 watt bulbs on shelves with a loose piece of plastic draped over the front. when there are 3 true leaves (not seedling leaves) I prick them out into permanent pots and continue with normal cultivation. I try to maintain 70% humidity for the seedlings at all times. When they are well established I try to keep the humidity as low as possible, and the light as high as possible which produces strong plants. Note I say "as possible" Keep a good eye on your plants, and do what they tell you;-) I have mine outside now between 40-80% humidity and they are now thriving. It has taken since about April of babying them to the point where they are now largely on their own.
The chlorine in the pool area air shouldn't affect the plants too much I don't think, but avoid splashing the water on them. If you have good light, you should be able to grow most Droserae at 60% humidity, the Queensland species and some of the South Africans being exceptions, at least so far.