Ive been away for a while, got back a little over a week ago. First thing i did was cleaned the filter. After a few days I did a 90% water change. I did another 80%ish water change tonight. My Nitrates are OFF THE CHAIN! It's typically been a little high, but now it's ridiculously high. All other levels are where they need to be, it's just the nitrates.
40 Breeder with about 35gal of water, Fluval 406, 10" air stone. 5" YES, 4 Tetras, Pleco, cory cat, and a crayfish.
Is the 406 just not powerful enough?