crush coral as gravel
nothing else.
i make an cajun "condo" and brake sont clay pot and throw them in.
and i have some shrimp also in it.
i feed them like pig, and lately i hav to introduse some MTS in to lcean a bit the mess they are doing

shrimp helping a bit by eating some rest and mts do the rest.
the tank was 2 years old bare bottom groing tank for my apisto, but icompletly redid it, but i keep sponge , and some water.
i am also breeding CPO, in a tank with a setup completly differente.