I have an open-top tank, and yesterday one of my fish jumped out. Luckily, my wife was right there and just threw him back in. I'm going to get a top for my tank now, but I don't want glass or acrylic because it gets hot in the summer, and I don't want to mess with having a chiller. I'm looking for something similar to a grate that will let air in, keep fish from jumping, but not block too much light. Anyone know of anything?