had a nice couple come in today for a water test, the ph was high but not too bad and the nitrites were fine, the ammonia , however, was through the roof. I started asking all the basic questions and it turns out they had a 25 gallon tank with a small oscar, some angels, a bunch of tetras, and some minnows. the tank had been set up a week ago and all the fish were added at the same time when they started the tank. the fish were fed three times a day. it wasn't really their fault though because they just didn't know, i told them what they had to do and gave them some gravel from one of the store tanks to help start a bacteria colony