The Aquarium ignores most (if not all) outside registry changes as long as it runs. On exit it writes its current settings back.
To make this work the Aquarium needs to be closed and restarted by Fish Picker. So it would not look smooth at all.
Then there may be timing problems if the aquarium is still writing to the registry while it exits and fish Picker starts to write new settings at the same time. Ouch!
