Filters · Hang-on-back
Tetra Whisper IQ 20
Adjustable 10–130 GPH flow; Tetra gives no tank size.
Adjustable-flow HOB filter with a SoundShield motor barrier and Bio-Bag cartridge.
Consider: Uses Large Bio-Bag cartridges. Include replacements in the yearly cost; its adjustable 10–130 GPH range doesn’t tell you what tank size it suits.
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US version, item 78001. Check what’s in the box before you buy.
Tank size Tetra rates it for
Range not published
Choose your tank to see where it falls.
Check it against your tank →Specifications that affect fit
- Manufacturer capacity
- Not published
- Power
- Not published
- Supply voltage
- Not published
- Dimensions
- Not published
- Pump output
- Not published
- Filter circulation
- Not published
- Maximum flow
- 130 GPH
To see what it costs to run, enter the watts on its label and your daily hours in the electricity cost calculator.
Pump output, filter circulation and maximum flow are measured in different ways. Your filter will move less water than the box says once media and hoses are in. Measure it with the flow calculator.
Before choosing this model
- Confirm model 78001.
- Do not treat the 130 GPH maximum as in-tank turnover after media and head losses.
What Tetra doesn’t publish
- Tetra doesn’t publish a tank size or the filter’s body size. If you are buying for a particular tank size or a tight gap behind the tank, choose a filter that lists both, or measure this one in its box.
- Read the watts on the filter’s label before you use the electricity cost calculator; leave the watts blank rather than entering 0.
A filter rated for your tank can still be too tall for your cabinet or too strong for small fish: see how to choose one.
Check it against your tank → Something not working? See the troubleshooting guide.
Choose and care for mechanical, biological and chemical media before buying replacement supplies.
Included items & upkeep
- filter body
- flow control
- Bio-Grid
Plan for the routine work
- Unplug before impeller access.
- Follow the manual’s cool-water rinse and reassembly sequence.
To budget for replacement media and supplies, use the first-year cost calculator. For how often and how to clean it, follow the maker’s manual.