I have a 4" salvini, a 6" tiger Oscar, a 6" red devil, a 6" Jack Dempsey, a 6" tinfoil barb, a 7" spotted gar, a 12" lemon Oscar. All get along great, no fighting and all are pellet fed with no live food. The problem is they are very messy and leave a lot of chewed or shredded food scraps. I...