Yup.TheMick said:I'd say it's a personal choice. It'll all work for the fish really.
To some degree what works - at least visually - may be dependent on the fish you're keeping.TheMick said:I've got black sand with a black background in my tank (pics of it are posted a few post down if you want to see). It was just what I thought looked good personally.
I could see the colors varying for sure. I've personally felt that the darker colors help the fish color up better but I don't have hard research on it or anything either. Just a personal observation.TheMick said:I just moved a breeding pair of Melanochromis auratus and four of their offspring from a 20G Long which had Black Diamond blasting media in it for the substrate. All of the fish were nicely colored up ... the male was very dark, almost black ... and the others had lots of yellow.
They were put into a 20G Long with Caribsea aragonite which was a pretty bright white.
All of the fish lost their color, appearing washed out. After a few days a couple of the fish have somewhat regained it ... but they aren't back to where they were before in the other tank with the black sand.