I have a 75 Gallon I want to set up for a shell dweller tank. However I know this tank is wayyyyyy to large for this to look right. I have seen videos of tanks with open sand areas for the shell dwellers and the other half with rocks for other cichlids. What can I put together to maximize the use of the tnak and make it look interesting. I would like to do just two species, One shell dweller one .... well, that is what I am looking for.