I have two 120 gallon tanks with a 60" x 18" footprint. I was thinking of doing a group of ten Ectodus Descampsi in one tank and a group of eight Ventralis in the other. Could I possibly have a pair of Eretmodus Cyanostictus in both of the tanks also? Most of the footprint would be left open. I was thinking some small rock piles in the corners for the gobies and a few openly spaced rocks in the open sand floor to seperate territories for the Descampsi & ventralis. Would this work?