Now that i think a little more about it I'm pretty sure they had it set up with a waterfall going down that back rock wall, i might have to plan a trip over there to check that tank out again and get some pics.
Yeah...I'm thinking that using the waterfall with saltwater will be a mess that I don't want to deal with, especially with salt creep accumulating. What I'm going to do is to use the waterfall feature as the outlet for my auto top-off. We'll just have to see how it works out. I'd definitely be interested in seeing pics of their setup though! Thanks for taking a look at my build!