clean up crew for a 24g nano cube?

[BiggySmalls]

i have

only 2 turbos
2 nassarius
and 3 hermits

and my tank is still clean and is 3 months old

i know i need more but what to i need?

 

[Illuminati]

I'd get a few more Nassarius snails for the sandbed, a few Cernith snails (good for multiple types of algae's that come up) and a few nerite snails (They do a good job cleaning both glass and rock).