Thanks. It's an acrylic tank I've had now for about 18 years. All I have in there with the fronts at the moment are six large clown loaches and two large synodontis cats (they been together for a few years now). I'm moving soon so I cleared out the tank to make it easier for the move, and only kept the two remaining fronts and these others. It used to be a Tanganyikan specific tank with the Fronts, Altolamprologus, and Leleupi. But the last year or so I've been downsizing several tanks so it was a mixed African tank until I cleared it out last week. Everything else in there that I gave away to a family member. Thanks for the replies.