so I have been cycling my tank for a week now with a low stock count of 6 plattys in a 40 gallon and a 10 gallon sump. About 4 days in I had a trace ammonia level of .25 ppm. so I thought great, cycle here we go! well every day after that I get readings across the board of 0. 0 ammonia, 0 nitrite and 0 nitrate. Now scouring zee internets and this forum one is lead to believe this is rather possible however I'm hesitant to believe it. why... well I don't know call me a sceptic. When something seems to good to be true it probably is. It is a planted tank running presurized CO2 so I suppose it is possible. In the end all this ranting is to sum up one question. Do partial water changes or just let it ride to see if I can get some readings out of the cycle?? API freshwater master test kit for anyone wondering.