yes, it works wif a skimmer, u will notice ur skimmate overflowing when u use this product........ AZNO3 or not, i strongly advise u to get a good skimmer for the long run and well being of ur tank.
juz me 2 cents.
me??? juz a modest tank..... nothing to speak off really....... but u r always welcomed to visit. if soon, let me know....... coz i'll be in japan for a meeting for a couple of days starting next monday.