I'll soon be upgrading my 55 to a 75 and am thinking it might be nice to make the switch from "natural" tan gravel to one of the black substrates. Question for black substrate users: What background color do you use? Black, Blue, other? I'd like to see better contrast coloration of fish such as cardinal tetras, harl. rasboras, etc. My initial thought was black substrate with deep blue (maybe even a shade or two darker than navy blue) as the background. Seeking opinions.
TIA
Andy
TIA
Andy