I was leaning HFM primarily because it is much simpler to set up
I don’t have your skills. The other big advantage is if I ever lose power the spongers are in the tank and still provide some bio. Between that and a heated drip my tank will easily sustain power outages.
Not sure it’s a great polisher. Will be 20ppi and running 3x turnover. Hoping the ultima will really be the mechanical side also.

Not sure it’s a great polisher. Will be 20ppi and running 3x turnover. Hoping the ultima will really be the mechanical side also.