Took a look at this, and it does look better than most aquarium screen savers I've seen. Unfortunately, all settings are done within the screensaver & not in System Pref's. Whenever I try to change the settings, the screen saver stops. It would be nice to have the settings where they should be, where you can alter to your liking.
I noticed their forum has an awful lot of questions and problems with add-on's. Screensavers really should be simple. If you need a forum for a screensaver, it is too complicated, or it isn't working right.
I'll pass on this one...