I actually have a mistking mister and a pump that runs a drip line I thought of adding sprinklers for the exact effect you are after. The mister though does a good job with watering everything but I like the idea of a a heavier rain type setup. My tank also floods twice a day so watering is really just for the higher plants in the tank that are above the flood level. I'm planning on some needed maintenance and pictures over the next week so look out for pics in the near future.
cool len, i look forward to seeing the updates. i need to read your thread again (it's been a while). i want a refresher on your tidal system. definitely one of the coolest things i have seen in a palu.