I am selling the following:
- Al-60 Linear Air Pump (newer casing)......$110
- Ap-60 Linear Air Pump (older casing)........$65 or Both Al-60 for $150
- Al-80 Linear Air Pump (newer casing)......$130
- Al-80 Linear Air Pump (older casing)........$75 or Both Al-80 for $180
I ran the Al-60s for a couple of years and expanded my tanks and purchased the Al-80s (only used for like a year)
I would run the backup for a few weeks a couple times a year.