I have 125. We started a fishless cycle 9 day ago. After a short time the AMM was 8.0 or higher, when checked early the next day was down to 4 or so. After the 9 days the reading still seems to be close to the 4.0 ppm mark. Also our water temp is 84 and the pH is 8.0 with no lights. Should we wait it out some more or do some water changes?