Works great! I sometimes get some gurgling when the water level in the back goes a bit low (ATO doesn't go off), but I think having the level a bit higher helps with that. Mine is only a couple inches above the pumps, but I could probably raise it a couple more inches ro reduce noise. I still use one gyre in the tank, but the dual Mighty Jets put out some decent flowSetting up a im 40L, how’s the noise in the back sump with 2 mighty jets? Considering same setup with rfg’s. Awesome job on the tank!