I use a dcs1200 on my nano, with copepods I have 3 jars that I culture them in.
No air pump or anything fancy, just add a drop of phyto to just add a tinge to the water and just add another drop once water goes clear, the copepods in jars are constantly multiplying and I just pour some into the tank every 2-3 days, which seems fine for my pipefish as always see them picking the pods of the glass.