question:i have a fish only tank(aggressive)six fish....(so im not to worried about it),but its not good to have it that high even with a fish only tank.....fish seems to be doing well...all are eating and very active ....i have done several water change about 20% every three days....but no change in nitrates....i thought it was maybe my test kit but i took some water to aquatic warehouse and it was verified...now my ammonia and nitrites were reading high about a month ago and realized that my skimmer wasnt working properly...got that fixed and now they read almost 0...but i cant seem to get my nitrates down....any suggestions



thx in advance