sorry i havent gotten back. i got the api liquid test kit. today i got the readings of ammonia 4, ph 7.2, and 0 for nitrate and nitrite. i did a 50% water change and tested the water 3 hours later, ph 7.2, nitrate and nitrite 0, and ammonia 1. how often should i do a water change and how much? also i used the python thing today, that is the best thing invented!