Not trying to hijack the OP's thread, but i have considered changing to a lighter substrate, but at the moment my male is an almost iridescent purple and really does look good. I think the he would lighten for the worse, on a different substrate. I haven't tried it, so i am just assuming. If i didn't like it, changing back to black would be a pain in the $$$
I also have a few smaller growouts, that are on lighter gravel, so i guess time will tell
They are great fish, alot more interactive than i thought they would be. My male is more like an Oscar, getting excited everytime i go near him. He will happily take crickets and locusts from my hand.
I like the look of these guys on the black sand, but I'm also curious on what they would look like with neutral substrate. Please take/post some pics if you can.






