Hey all. As you've probably read, I am going to be setting up a 40gL tank soon to be a betta soririty/community tank. I was originally going to paint the back of the tank black for the background, but someone on another forum (a forum dedicated to bettas, I might add) said that black backgrounds tend to stress bettas out. Does anyone know the validity of this? I know that Newman has a black background on his 40gal flat-back hex and both Silver (his delta tail male) and Flash (his plakat male) don't seem bothered by it in the least. Any thoughts on this? What I was really going for in the 40gL in the background was something dark that my bettas, neons, platies, DW and plants would stand out against. Black seemed the most logical choice, especially considering my substrate is going to be darker as well.