for apple snails:
you need a male and female
high pH and lots of calcium(cruched coral works great)
driftwood
a 1.5-2" gap between the water and top of tank(they lay eggs out of water)
raise the temp to 81* and start feeding more. (they start their breeding when the water gets warm and food in plenty)
like i said before, they lay their eggs out of the water so keep a tight lid to preserve moisture and give it 2-3 weeks. The babies will fall into the water and start feeding so keep food availible.
Trick part if cleaning the tank without sucking up babies.
*check the photo thread ling in my signature to see my snails*