hey a couple of days ago I checked my nitrate and it was really high ,I think its because I have been overfeeding my fish which are 1 figure eight puffer and two mollies. I have a 55 gallon tank so I changed about 80 percent of water and added all my things like nitrex which eliminates nitrate I added about 3 times more than I usually do which it says to do in emergencies. So I checked my nitrate again and it was still pretty high not as much but still high. can anyone help me with any suggestions , could it even be my filter which is about 2 months old? . Any help would be appreciated thanks.