In the stats area in the upper left of your screen you will see Sleep (XX), where the XX is the sleep number. Use the up and down arrows to adjust this. What you are doing is turning down your settings and lowering your FPS so that your system
isn't running flat out all the time to render the aquarium. This keeps your system from overheating from rendering the screensaver as hard as it can for hours at a time. When we get out of the Beta stage Jim plans on making a place within the settings screens like 2.6 for "lowering the frame rate" which will do the same thing that the sleep setting does now.
I usually adjust mine where I am getting about 40-50 fps, which is about half to one third the total frame rate that the video card on my office machine can produce. This can keep you from frying your hardware components by lowering the heat produced.
