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Seachem aquarium equipment

7 Seachem models by type and size, smallest first. Each row links to the model’s page with its fit checks, what comes in the box and its upkeep.

Filters (4)Water testing (2)Water conditioner (1)

Seachem filters

Seachem filters, smallest first; sizes are length × width × height
Model	Type	Rated for	Flow	Size (in)	Power
Seachem Tidal 35	Hang-on-back	Up to 35 US gal	130 GPH maximum	6.125 × 5.125 × 7.125	6 W
Seachem Tidal 55	Hang-on-back	Up to 55 US gal	250 GPH maximum	8.0625 × 6.125 × 8.375	6 W
Seachem Tidal 75	Hang-on-back	Up to 75 US gal	350 GPH maximum	10.125 × 7 × 9.5	8 W
Seachem Tidal 110	Hang-on-back	Up to 110 US gal	450 GPH maximum	11.625 × 7.625 × 9.5	12 W

Every brand’s filters →

Seachem water testing

Seachem water tests
Kit	Type	Tests for	Range
Seachem MultiTest Ammonia	Liquid test kit	Total ammonia and free ammonia	down to under 0.05 mg/L (ppm)
Seachem MultiTest Nitrite/Nitrate	Liquid test kit	Nitrite and nitrate	nitrite down to under 0.1 mg/L, nitrate down to under 0.2 mg/L

Every brand’s water testing →

Seachem water conditioner

Seachem water conditioner, smallest first
Model	What it is
Seachem Prime 100 mL	Concentrated fresh- and saltwater conditioner for chlorine and chloramine treatment.

Every brand’s water conditioner →

Choosing between them

A size up is not always better: a filter rated for a bigger tank can push too much water for small or long-finned fish and needs more room behind the tank or in the cabinet. Each model page says what to measure first.

Side by side: Fluval 107 vs Seachem Tidal 35 · Seachem Tidal 35 vs Seachem Tidal 55 · Fluval AC50 vs Seachem Tidal 55

The whole catalog · Replaced and renamed models · Plan equipment for your tank