So i took a reading of my water parameters and my ammonia was reading 2.0 ppm nitrite 0, im thinking at one point or another I messed up cleaning and killed the cycle. I have a seperate 30 gallon tank with an eheim xl1200 that is reading perfect parameters. I did a 50% water change yesterday and it didnt seem to help with my ammonia readings though my tank is certainly borderline overstocked. I was thinking about getting enough TSS for 300 gallons and treating the 220+55 with the addition of kitchen scrubbies to the sump for added surface area for new BB. Will this suffice? I would prefer to keep the 1200xl on the 30 gallon as it is housing my 6 inch motoro until I figure out my water parameters for the main tank. If the first solution is a no-go do you think there is enough BB in the 1200xl filter to begin a new cycle in the 220?