Air & backup · Air pump
Tetra Whisper 20 Air Pump
Rated for a 20 gal tank
- Power
- Not published
Consider: One outlet: a second air stone or sponge filter needs a gang valve to split the air, or a two-outlet Whisper 60 or 100.
Aquarium air pump: compare the choices
12 air pumps, drawn at their published size on your tank and checked against the maker’s rating.
12 models
Fit marked for 20 gallon long (example)
Air & backup · Air pump
Tetra Whisper 40 Air Pump
Rated for a 20 gal tank
- Power
- Not published
Consider: One outlet: a second air stone or sponge filter needs a gang valve to split the air, or a two-outlet Whisper 60 or 100.
Air & backup · Air pump
Tetra Whisper 60 Air Pump
Rated for a 20 gal tank
- Power
- Not published
Consider: The 2.6 L/min is both outlets together, so each device gets part of it; balance two devices with the valve on each line.
Air & backup · Air pump
Tetra Whisper 100 Air Pump
Rated for a 20 gal tank
- Power
- Not published
Consider: The 3.3 L/min is both outlets together, so each device gets part of it; balance two devices with the valve on each line.
Air & backup · Air pump
Tetra Whisper AP 150 Deep Water Air Pump
Rated for a 20 gal tank
- Power
- Not published
Consider: Tetra’s page gives no air flow or watts, so it can’t be compared with the smaller Whispers on numbers; choose it for a big or deep tank, or several air stones.
Air & backup · Air pump
Tetra Whisper AP 300 Deep Water Air Pump
Rated for a 20 gal tank
- Power
- Not published
Consider: Tetra’s page gives no air flow or watts, so it can’t be compared with the smaller Whispers on numbers; choose it for a big or deep tank, or several air stones.
Air & backup · Air pump
Aqueon QuietFlow Air Pump 40
Rated for a 20 gal tank
- Power
- 2.8 W
Consider: Its check valve is built in and Aqueon gives its watts, but not its air flow, so you can’t compare it with other pumps on air.
Air & backup · Air pump
Aqueon QuietFlow Air Pump 100
Rated for a 20 gal tank
- Power
- 3.8 W
Consider: Its check valve is built in and Aqueon gives its watts, but not its air flow, so you can’t compare it with other pumps on air. Two outlets run two sponge filters or stones.
Air & backup · Battery backup air pump
Aquarium Co-Op Battery Backup Air Pump, Single Outlet
- Power
- 1.2 W
Consider: Battery runtime varies with age, depth and airflow, and the maker’s runtime figures cover units sold since 2024-08-01. Test it with your own tubing and diffuser before relying on the stated outage duration.
Air & backup · Battery backup air pump
Aquarium Co-Op Battery Backup Air Pump, Dual Outlet
- Power
- 2.1 W
Consider: The stated airflow is a total, not a promise for each outlet. Test both connected devices together and balance their air delivery before relying on the backup. The maker’s runtime figures cover units sold since 2024-08-01.
Air & backup · Air pump
Tetra Whisper 10 Air Pump
Rated up to 10 gal, not 20 gal
- Power
- Not published
Consider: One outlet: a second air stone or sponge filter needs a gang valve to split the air, or a two-outlet Whisper 60 or 100.
Air & backup · Air pump
Aqueon QuietFlow Air Pump 10
Rated 2–10 gal, not 20 gal
- Power
- 1.5 W
Consider: Its check valve is built in and Aqueon gives its watts, but not its air flow, so you can’t compare it with other pumps on air.
No models match these filters.
Clear the search or choose another tank size. The size filter only shows filters and heaters that their maker rates for that size.
The size filter and the fit marks use each maker’s tank-size rating for filters and heaters and the fixture span for lights. Drawings use the makers’ published sizes; positions are approximate. Where a maker doesn’t publish a rating, we don’t guess one; each model page says what is missing.
Before choosing air & backup
An air pump is one part of a system. Match the outlets, airline, valves and sponge or diffuser, and check the maker’s depth instructions. For a battery model, check how its backup switches on and what else it needs.