I use them to service my 34 gallon tank. This includes 5 gallons of water changes + 5 gallons of automatic tank refills per week. That gives me about 40 gallons a month. Filters last for about 3-4 months. I think they should last much longer than 120-160 gallons. On the other hand, however, they are easy to replace.
NANPU 1/2" NPT Air Drying System - 5 Micron Particulate Filter, 0.01 Micron Coalescing Filter, Air Pressure Regulator Combo - Semi-Auto Drain, Poly Bowl W/Metal Gauge
23 Review
Filter under the sink Aquaphor Favorit ECO silver
20 Review
NANPU Air Drying System With Double Filters And Pressure Regulator Combo For Clean And Controlled Air Supply
18 Review
NANPU DFR-02 1/4" NPT Air Drying System - Double Air Filters, Air Pressure Regulator Combo - Semi-Auto Drain, Poly Bowl
20 Review