So i am planning on getting a waterbox reef lx 270 gallon tank and wanted to get a ray for it, but i started thinking about the rimless aspect and I was hoping to get some advice from people who have kept a ray. Will it try to swim all the way up the rim and potentially fall out or make a big mess? I was going to make my order in the next couple weeks and now I am wondering if I need to rethink my tank or potentially go with a custom lip (though for price reasons this isn't my preference). Some thoughts and advice would be great!