Water, water, everywhere

I know I said good things come in threes but this is ridiculous:

I'm working on the middle part of my earthwaterfire triptych and here are three possible colour/layer compositions. (Yes, the digital camera audition comes to the rescue again ! ) I'm concerned that putting a dark layer in the middle cuts the quilt in half visually. So I'm going to put this aside for a while to ponder...