Filters · Hang-on-back
Seachem Tidal 35
Manufacturer-rated for aquariums up to 35 US gal; needs 2.75 in wall clearance and fits trim up to 13/16 in.
Self-priming HOB filter with adjustable flow, surface skimmer, basket media, and maintenance indicator.
Consider: Rule it out if the trim is thicker than 13/16 inch or rear clearance is under 2.75 inches; measure both before ordering.
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US version. Check what’s in the box before you buy.
Tank size Seachem rates it for
Up to 35 US gal
Choose your tank to see where it falls.
Check it against your tank →Specifications that affect fit
- Manufacturer capacity
- Up to 35 US gal
- Power
- 6 W
- Supply voltage
- 120 V / 60 Hz
- Dimensions
- 6.125 × 5.125 × 7.125 in (L × W × H)
- 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
- Measure wall and trim clearance.
- Set flow for the animals and layout rather than using capacity alone.
Our buying guides size it for these tanks:
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
- foam filter
- Matrix bio-media
- documentation
Plan for the routine work
- Watch the maintenance alert and inspect the basket.
- Unplug before removing the pump or impeller.
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.