Okay so I waited a little too long to do my next exchange and I was at 8.4 ph, between 4-8 ppm ammonia, 1 ppm nitrite, and still 5 ppm nitrate. I did a 75% exchange and I'm at 8.2 ph which is my norm, between 2 -4 ppm ammonia, .25 ppm nitrite, and still right around 5 ppm nitrate (which confuses...