what type of substrate did you use for that look?

pool filter sand , black gravel and white gravel

looks like a good combo, I'm trying to put something together for 8 40 gallon tanks in our store. I already have cichlid mix in 4 out of 12 tanks, and it looks great.

awesome, love the tapajos and the dempseys a looker to. im going geo hunting tomarrow, i have my eye on a large male altifrons, hope they still have him when i go:)