When I downloaded the demo I found the annoying ad page a bit too annoying and almost trashed it but then I just left it for a while and realized how good it really is so I paid for the full version.

This is the best aquarium screensaver I have ever seen. It really is very good.

Just one request/suggestion. How about separating the water sound from the hum sound? The water sound is pleasant and relaxing while the hum can get annoying.