Yeah I would avoid the Chaca, night mare from what I hear they release that ph chemical when threatened so in a tank with big cichlids haha....
Poo is a problem with sand I rehomed mine for that very reason but with those big cichlids poo is poo so yeah, have you thought about black sand maybe? Or lots of ground cover helps to hide it?
Trying to think of an other big cichlid for you but youve gone through quite a few choices haha
Wills
sand was only the choice because i have loads of bags of argos playsand in the garage already that i bulk bought for any future tanks and topping up existing tanks as i had lots of cory tanks at one time. i could go gravel as ive nothing that really needs sand, maybe i was being tight....
im sure my daughters sandpit could find use for the bags of sand!
there are so many cichlids to choose from its so hard to narrow it down to just 3 or 4. i love the one in your avatar and an lfs actually has a tank with 10 or so real small ones in at the minute but they are very small, no bigger than 1.5-2 inches. i like the texas, an adult GT also looks great but its just compatability really thats put me off these. still not feeling the choc though, sorry nelly. you have now got me thinking about another L number