My twenty gallon tank is home to 3 baby cichlids until i get my 55 set up next week. ive had this tank going for nearly a year.. did a fishless cylce. what is causing ammonia and nitrate ? i have 3 filter pads in my filter so i could put one in my new tank to help with bacteria...is 3 too many? help!! oh- i should also mention...this is a new thing ..been going on for a few weeks... this is not normal as i test weekly usually.