hydor will be a better choice, if you think 3000 is too much, can try Hydor Koralia 1 - Wavemaker Pump 1500L/h at around 6 red and 4 purple notes.
if you are budget wise, you can get back the sunsun 3000 again .. actually its not that bad (am using one for my sump for 1 month and the current is good for my sump ,(of course for the price haha)it seems ok till now......)
or you can get seio m620, around 4 red note if i am not wrong(can get from reefer selling them). current not that strong.. but think its ok for your nano tank
my 2 cents