the bio media in second chamber was up for like the past 9 months did like the first bin i was usining and pump were to small so i just went with a taller sump so that i could add more bio, and i had a mag 5 tryin to run it yeah right no justice so when the new pump came i decided to make mke my changes like i said now i get like 4 * turnover been runnin for like a week.