what to add to nano tank?

[Ruth]

Regular, large (like 50% or more a week) water changes. Every once in a while I dose some Phyto and maybe once a month some reef roids. Thats about it and I have great growth on all corals.
Also have a very low bioload in all my nano's - in fact the only one that has more than one fish is my 20g which has 2 percula clowns and a yellow goby. My other 20g has one tomato clown my 10g has a Mantis shrimp and my other 10g has a yasha hashi gobie and a pistol shrimp.