I don't believe the new water level is saved. That is probably obvious since you have already saved and it is still at the same level.
I'm not really sure what you are trying to do here. It kind of sounds as when the player is in level 3 the water rises but when the player gets to level 5, it is the same level as level #3. I'm not sure what you are trying to do or what effect you want. Remember the developer and the actual player are two different things.
"A programmer is just a tool which converts caffeine into code . . . reminds me….. if I had one more brain cell, I could have a synapse! woo hoo, Sparky!
~I'm the Terry of the Flatlands.