can lah... but not as effective...
I believe a good skimmer helps to keep a nano easier.
they always say WC frequent, dun need skimmer......
but unless if you really have that discipline to be like ah siang... WC every 3 days... else a good skimmer can help keep your water clean longer....
also in nano, very easy to overfeed. this leads to algae, high nitrate etc....
with a good skimmer, this problem is less evident.
but redsea prizm also can lah... you just need to balance your skimmer effectiveness, stocking level, feeding regime, WC frequency
just like mp 10 is a wavemaker. if cannot get one for the time being, koralia K1 is also a usable wavemaker.
LED is nice, if cannot get, use T5, if cannot get T5 use PL lor......
just that stocking level and LS selection will be different then.... but you still can set up a nice tank using whatever eqpt.....
just different type of nice reef tank.....