I had a gramma in with my two clowns. He will be fine. They do like rockwork though so make sure you have some nooks and crannies for him.
180g- Mostly BIG fish and some coral. ~80g Nuvo- My coral tank with "happy fish"~ 90g- FOWLR Not the not happy type of fish~ 125g- Freshwater Malawi Cichlids ~10g- Nuvo- The refugees from the Ich of '18