Wayne Sallee wrote:
Actually Pszemol, you left out a lot of important detail about how to
properly do a scientific study.

You also need to do the following.

Make sure the fish are of the exact same age.
Make sure the fish are of the exact same size.
Make sure the fish are of the exact same mas.
Water of the same exact temp +- .00001 degree.
Tank size of the exact gallons
Tank size of the exact dimensions.
Rock, sand, gravel of the exact same mas.
Rock, sand, gravel of the exact same size
Position in the room of the exact same location.
Sound in the tanks to be the exact same.
Food measured out to the .00001 kilograms.
Lighting measured daily to make sure each tank is getting exactly the
same amount.
At least 10 tanks of the control.
At least 10 tanks of the test.

snip

2 sets of 10 is way to small a sampling to be of any statistical
significance. A proper study would use several thousand tanks in each group.
A