I'll throw in an opinion, I have the white gravel at the front leading to a speckled river pebble in the background, was part of a bigger plan to aquascape more professionally, but that never happened, lol. I find the white background really washes out the finer details of community fish unless you're parked right in front of the tank, all the subtle green and blue pearlescence is lost unless you have your nose against the tank, which is contradictory against what I had read that dark tanks can wash out the fish colours.... My next tank will have a dark gravel so time will tell which I prefer to make the fish "pop"..
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