run a powerhead on the uplift
The lotus project is a 13 gal plastic tub with a power head.
The display tank has a Ehiem 600 (2217) on the UG uplift. The return flow is split between an in tank spray bar and an external trickle/oxidation tower which I made from an old steel framed tank 24" x 12" x12" mounted vertically (re-glazed with a drilled base and drilled overflow on a side pane near the top). The unit is mounted above the display tank but in the next room. [Drilled panes are perspex, not equipped to drill glass]
CO2 is via an in tank difusor with an inline power head to a spray bar. Inlet filters are shrimp proof wire mesh fitted to 3/4" plastic pipes.
The display tank is in a chimney breast , only the front viewing pane is visible, the gubbins are in the next room which is a conservatory.