This is actually a really random question but just want to see what you guys think. So I am considering getting a 20 gallon long tank to divide for my 5 male bettas so they would each have 4 gallons. I have always used natural looking gravel, but I am thinking about using colored gravel for each of their "sections" in the tank. I would like to get gravel that really brings out their colors. So I have a black betta with orange fins, a black and red crowntail, one with a white body/red spotted fins, and a red body with white/red fins, and I don't have the 5th betta yet :) So any idea what color of gravel would bring out their colors? Do you think if each section was a different color it would kind of look funny? Thanks.