I have one green clown in a 9G. I don’t know exactly what I should feed him. I’m new to salt. I’m used to just daily fish pellets and the occasional bloodworm treat. I see they might like mysis shrimp or blood worms but all the frozen cubes are so big if I put that in the tank for 1 goby he’ll have like 10x what he needs. How do I feed ONE green goby without waste?